Relevant bibliographies by topics / Laser intensity noise

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  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
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Academic literature on the topic 'Laser intensity noise'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Laser intensity noise"

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Luo, Cheng-Jhih, and Yinchieh Lai. "Relative Intensity Noise of Hybrid Mode-Locked Bound Soliton Fiber Laser: Theory and Experiment." Applied Sciences 8, no. 9 (August 24, 2018): 1451. http://dx.doi.org/10.3390/app8091451.

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Relative intensity noises (RIN) of mode-locked lasers are properties which are crucial for applications. In the literature, there have been plenty of theoretical/experimental studies on the RIN noises of passive/active single-pulse mode-locked lasers. Since some mode-locked lasers can also be operated under the bound-pulse mode-locking state, it is thus very interesting to further examine the RIN properties under bound-pulse mode-locking, and to verify if there are possibilities for RIN noise reduction as predicted by some previous theoretical works. The conventional analytical formula based on the soliton perturbation theory can no longer be applied due to the pulse shape complexity for the bound-pulse mode-locking cases. New theoretical tools for modelling general mode-locked lasers are eagerly awaited. In the present work, the RIN noises of an environmentally stable 10 GHz hybrid mode-locked Er-doped fiber laser capable of bound-soliton generation are experimentally investigated, and a novel theoretical method based on the linearized backpropagation approach is theoretically developed for calculating the RIN noise spectra of general mode-locked lasers. Both the theoretical and experimental results demonstrate that the RIN noise of the bound-soliton state can be lower than that of the single-soliton state by following the laser power scaling tendency.
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Nocera, F. "LIGO laser intensity noise suppression." Classical and Quantum Gravity 21, no. 5 (February 3, 2004): S481—S485. http://dx.doi.org/10.1088/0264-9381/21/5/014.

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Ahmed, Moustafa. "Theoretical Modeling of Intensity Noise in InGaN Semiconductor Lasers." Scientific World Journal 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/475423.

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This paper introduces modeling and simulation of the noise properties of the blue-violet InGaN laser diodes. The noise is described in terms of the spectral properties of the relative intensity noise (RIN). We examine the validity of the present noise modeling by comparing the simulated results with the experimental measurements available in literature. We also compare the obtained noise results with those of AlGaAs lasers. Also, we examine the influence of gain suppression on the quantum RIN. In addition, we examine the changes in the RIN level when describing the gain suppression by the case of inhomogeneous spectral broadening. The results show that RIN of the InGaN laser is nearly 9 dB higher than that of the AlGaAs laser.
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Buchler, Ben C., Elanor H. Huntington, Charles C. Harb, and Timothy C. Ralph. "Feedback control of laser intensity noise." Physical Review A 57, no. 2 (February 1, 1998): 1286–94. http://dx.doi.org/10.1103/physreva.57.1286.

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Nguyen, Anh-Hang, and Hyuk-Kee Sung. "Improving the Performance of Optical Phased Array by Reducing Relative Intensity Noise of Optically Injection-Locked Laser Array." Photonics 9, no. 11 (November 17, 2022): 868. http://dx.doi.org/10.3390/photonics9110868.

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Relative intensity noise (RIN) is an important factor that determines the performance of optical phased arrays (OPA) that are configured using semiconductor lasers as light emission sources. This study proposes a method of improving the optical signal-to-noise ratio (OSNR) of an OPA by reducing the RIN and using high coherence of optically injection-locked (OIL) laser arrays. We numerically demonstrated a laser RIN reduction of 22.7 dB by the OIL laser compared to a free-running laser. We achieved an OPA RIN reduction of 13.2 dB by combining the coherent outputs with the uncorrelated noise of 21 OIL lasers, compared to a single OIL laser RIN. Consequently, we demonstrated an OPA OSNR increase of approximately 13.8 dB based on the OIL-based OPA compared to that of the conventional noise-correlated OPA configuration. Additionally, we confirmed the maintenance of OPA OSNR improvement during OPA operations.
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Wang, Jiaqi, Haosen Shi, Chunze Wang, Minglie Hu, and Youjian Song. "Impact of Laser Intensity Noise on Dual-Comb Absolute Ranging Precision." Sensors 22, no. 15 (August 2, 2022): 5770. http://dx.doi.org/10.3390/s22155770.

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Noise in mode-locked lasers has been a central issue for dual-comb metrological applications. In this work, we investigate the laser intensity noise on dual-comb absolute ranging precision. Two different dual-comb schemes based on linear optical sampling (LOS) and nonlinear asynchronous optical sampling (ASOPS) have been constructed. In the LOS scheme, the ranging precision deteriorates with the increase in laser relative intensity noise (RIN). This effect can be corrected by implementing a balanced photo-detection (BPD). In the ASOPS scheme, the experiment shows that the conversion from laser RIN to dual-comb ranging precision is negligible, making a balanced detection unnecessary for ranging precision improvement. The different manners of RIN’s impact on absolute ranging precision are attributed to the distinct cross-correlation signal patterns and the underlying time-of-flight (TOF) extraction algorithms.
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GIACOBINO, E., F. MARIN, A. BRAMATI, and V. JOST. "QUANTUM NOISE REDUCTION IN LASERS." Journal of Nonlinear Optical Physics & Materials 05, no. 04 (October 1996): 863–77. http://dx.doi.org/10.1142/s0218863596000611.

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The intensity noise of semiconductor lasers was brought below shot noise by about 30% using constant current supply together with line narrowing techniques. This result is shown to be in good agreement with theoretical predictions of a laser theory including regulated pumping. The latter theory is applied to the case of Nd:YVO 4 microlasers pumped by the sub-shot noise semiconductor lasers.
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Pillai, R., E. Garmire, and P. Menendez-Valdes. "Relative intensity noise of laser-diode arrays." IEEE Photonics Technology Letters 3, no. 11 (November 1991): 968–70. http://dx.doi.org/10.1109/68.97829.

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Poëtte, J., S. Blin, G. Brochu, L. Bramerie, R. Slavík, J. C. Simon, S. LaRochelle, and P. Besnard. "Relative intensity noise of multiwavelength fibre laser." Electronics Letters 40, no. 12 (2004): 724. http://dx.doi.org/10.1049/el:20040539.

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Xiao Nan Hu, Tao Liu, Yu Lian Cao, Bo Meng, Hong Wang, Geok Ing Ng, Xian Shu Luo, et al. "Relative Intensity Noise of Silicon Hybrid Laser." IEEE Journal of Quantum Electronics 50, no. 6 (June 2014): 466–73. http://dx.doi.org/10.1109/jqe.2014.2315212.

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Dissertations / Theses on the topic "Laser intensity noise"

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Hill, Timothy J. "Interference of intensity noise in a multimode Nd:YAG laser." Title page, abstract and contents only, 2003. http://web4.library.adelaide.edu.au/theses/09PH/09phh6484.pdf.

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Includes bibliographical references (leaves 151-163). Investigates the behaviour of the intensity noise in a multimode Nd:YAG laser. The collective modes of oscillation are excited by broadband ambient noise. Because the phase of the excitation is unknown, a cross spectral technique to measure the antiphase dynamics directly and form a picture of the intensity noise interference for two to five mode operation is developed. For three mode operation, the contributions of the longitudinal modes to collective modes is measured.
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Csatorday, Peter 1973. "LIGO photodiode characterization and measurement of the prestabilized laser intensity noise." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/85355.

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Sebastian, Ananthu. "Noise dynamics in multi-Stokes Brillouin laser." Thesis, Rennes 1, 2020. http://www.theses.fr/2020REN1S068.

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La diffusion Brillouin stimulée (SBS) est un processus d'interaction cohérent, pour lequel la lumière est diffusée à partir des ondes acoustiques générées optiquement. Les lasers Brillouin suscitent un très grand intérêt pour leur capacité à produire des largeurs de raie ultra cohérentes. Cette thèse est consacrée à la compréhension des propriétés de bruit des lasers à fibre Brillouin en anneau, fonctionnant avec de multiples ordres de Stokes. Tout d'abord, nous présentons une technique basée sur la méthode de ringdown de la cavité, qui permet de caractériser le coefficient de gain Brillouin directement à partir du sondage de la cavité laser. Ses avantages sont d'obtenir des paramètres à partir d'une seule expérience avec de faibles puissances optiques (quelques 10 milliwatts) pour des cavités courtes (quelques mètres de long, ou cavités intégrées). Deuxièmement, il est démontré qu'une largeur de raie intrinsèque de quelques dizaines de mHz peut être facilement obtenue en cascadant deux lasers Brillouin non résonants (pour lesquels la pompe effectue un seul passage à l'intérieur de la cavité). Afin d'obtenir ces résultats, la stabilité à long terme a été améliorée en utilisant une boucle d'asservissement de type Pound Drever Hall, ce qui nous permet de comparer nos résultats analytiques et expérimentaux. Malheureusement, nous n'avons pas exploré les limites fondamentales de la réduction du bruit en raison du plancher de bruit de notre banc de mesure. Troisièmement, un des travaux majeurs de cette thèse est l'étude analytique et expérimentale des propriétés du bruit, y compris le bruit de fréquence et le bruit relatif d'intensité, d'un laser Brillouin résonant (pour lequel, les ondes de pompe et de Stokes sont résonantes à l'intérieur de la cavité). En particulier, les impacts du facteur de qualité de la cavité fibrée en anneau, le désaccord de gain Brillouin ont été évalués très précisément sur les caractéristiques du RIN du laser telles que la réduction de l'amplitude du bruit et la fréquence de relaxation. Nous soulignons le fait que de nombreuses caractéristiques du bruit de fréquence sont liées aux propriétés du RIN par un couplage entre l'intensité et la phase. Nous montrons que le processus en cascade modifie la dynamique du laser Brillouin par rapport à celle d'un laser Brillouin monomode avec une seule composante de Stokes de premier ordre. Nos résultats expérimentaux sont en excellent accord avec nos simulations, obtenues grâce à notre système non linéaire décrivant le fonctionnement d'un laser Brillouin multi-Stokes. Cette bonne concordance est principalement due à notre capacité : à obtenir des valeurs très précises des paramètres de la cavité et du coefficient de gain Brillouin en utilisant la technique CRDM ; à atteindre une stabilité à long terme (plusieurs dizaines d'heures) ; à contrôler finement le désaccord entre la résonance de Stokes du laser et la fréquence du maximum de gain Brillouin. Nous démontrons expérimentalement pour la première fois que le bruit de fréquence est dégradé en présence d'une diffusion Brillouin anti-Stokes. Nous montrons également qu'un désaccord de gain de l'ordre de quelques centaines de kHz peut dégrader la réduction du bruit d'intensité ou également augmenter la largeur de raie par un couplage amplitude-phase. Toutes ces observations très fines nous permettent donc de fixer les limites fondamentales de tels systèmes laser comme : l'augmentation du bruit due aux ordres anti-Stokes ; le rôle du bruit de pompe et son interrelation possible avec la finesse de la cavité ; l'effet du désaccord inhérent aux ordres de Stokes plus élevés. Toutes ces conclusions sont les clés de la conception et de l'ingénierie de ces lasers à fibre Brillouin, qui suscitent actuellement beaucoup d'intérêt comme en témoignent les travaux en cours dans la communauté scientifique. Cette thèse de doctorat contribue à une meilleure compréhension des lasers Brillouin multi-Stokes
Stimulated Brillouin Scattering (SBS) is a coherent interaction process in which light is scattered from optically generated acoustic waves. It is a powerful tool for microwave and optical signal processing, distributed sensing and spectroscopy. Brillouin lasers are attracting a lot of interest for their ability to produce ultra coherent linewidths. This thesis is devoted to the understanding of noise properties of Brillouin fiber ring lasers, operating with multiple Stokes orders. First, we present a technique based on the cavity ring-down method, which allows to characterize the Brillouin gain coefficient directly from probing the laser cavity. Its advantages are to obtain parameters from a single experiment with low optical powers (some 10 milliwatts) for short cavities (a few meters long, or integrated cavities). Secondly, it is shown that an intrinsic linewidth of a few tens of mHz can be easily obtained by cascading two non-resonant Brillouin lasers (for which the pump performs a single pass inside the cavity). In order to obtain these results, the long-term stability has been improved by using a Pound-Drever-Hall servo loop, which allows us to compare our analytical and experimental results. Unfortunately, we were unable to explore the fundamental limits of noise reduction due to the noise floor of our bench. Thirdly, one of the major works of this thesis is the theoretical and experimental study of the noise properties, including frequency noise and relative intensity noise, of a resonant Brillouin laser (for which pump and Stokes waves are resonant inside the cavity). In particular, the impacts of the fiber-ring-cavity quality factor, Brillouin gain detuning, are evaluated very precisely on the laser RIN features such as amplitude noise reduction and relaxation frequency. We emphasize the fact that many characteristics of the frequency noise are related to the RIN properties by a coupling between intensity and phase. We show that the cascade process modifies the dynamics of the Brillouin laser when compared to those of a single-mode Brillouin laser with a single first-order Stokes component. Our experimental results are in excellent agreement with our numerical simulations, obtained thanks to our non-linear system describing the operation of a multi-Stokes Brillouin laser. This good match is mainly due to our ability: to obtain very precise values of the cavity parameters and the Brillouin gain coefficient using the CRDM technique ; to achieve long-term stability (hours); to finely control the detuning between the laser Stokes resonance and the frequency of the Brillouin gain maximum. We demonstrate experimentally for the first time that frequency noise is degraded in the presence of anti-Stokes Brillouin scattering. We also show that a gain detuning of the order of a few hundred kHz can degrade the intensity noise reduction or also increase the linewidth by amplitude-phase coupling. All these very fine observations thus allow us to set the fundamental limits of such laser systems such as: the increase in noise due to anti-Stokes orders; the role of pump noise and its possible interrelation with cavity finesse; the effect of the detuning inherent to higher Stokes orders. All these conclusions are key to the design and engineering of these Brillouin fiber lasers, which are currently attracting a great deal of interest as evidenced by the work in progress in the scientific community. This PhD thesis contributes to a better understanding of multi-Stokes Brillouin lasers
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Sathian, Juna. "Investigation of the intensity dependence of amplitude noise in electro-optic phase modulators." Thesis, Queensland University of Technology, 2013. https://eprints.qut.edu.au/63003/1/Juna_Sathian_Thesis.pdf.

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This thesis studied the source of instability in optical phase modulators used in high accuracy laser measurement systems. The nonlinear origin of the amplitude noise helped further reducing this instability in applications that rely on phase modulators to function. This outcome will have positive impacts on the development of new methods in the amplitude noise suppression.
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Guiraud, Germain. "Développement de sources laser à fibres dopées ytterbium haute puissance, monofréquence et à bas bruit d'intensité." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0648.

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Les sources laser à fibre, haute puissance et de faible largeur spectrale sont de plus en plus utiles pour des applications à la fois industrielle et scientifique. Cependant, le développement de ces sources est limité par les seuils d’apparition d’effets non-linéaires tels que la Diffusion Brillouin Stimulée (DBS) du fait d’un fort confinement de la lumière dans le coeur de la fibre. Un premier amplificateur en régime monofréquence de puissance moyenne égale à 50W a été développé à partir d’une diode laser signal de 50 mW. L’étude du bruit d’intensité sur cet amplificateur a montré que l’utilisation de fibres standards (diamètre de coeur < à 20μm) jusqu’à 50W est limitée par l’apparition du phénomène de DBS se traduisant par une dégradation du bruit d’intensité. Pour s’affranchir de ces effets non-linéaires, une solution réside sur l’utilisation de fibres à large aire modale (LMA) dont les diamètres des coeurs est égale à plusieurs dizaines de microns. Les fibres LMA présentent un recouvrement [coeur dopé / onde de pompe] optimisé conduisant à une réduction de la longueur du milieu à gain. Par cette stratégie de la diminution du confinement spatial du faisceau avec une diminution de la longueur d’interaction, le seuil d’apparition des effets non-linéaires est repoussé. Mais paradoxalement, cette stratégie va induire une nouvelle limitation non-linéaire, non plus en termes de puissance crête mais de puissance moyenne. En effet, les coeurs multimodaux des fibres LMA, couplés à une charge thermique par unité de longueur forte (pour une puissance de moyenne de sortie équivalente) vont induire l’apparition d’effets non-linéaires en puissance moyenne : les Instabilités Modales (IM) et la Dégradation Modale de la Fibre (DMF). Ce sont donc les stratégies usuelles utilisées pour repousser les effets non-linéaires qui ont conduit à l’avènement de ces nouveaux effets délétères. Un système d’asservissement du bruit d’intensité efficace (suppression > 30 dB) sur une bande passante d’1MHz permet de supprimer le bruit en excès des diodes de pompe
High power, narrow linewidth fiber lasers are useful for both industrial and scientific applications. Nevertheless, nonlinear effects like Stimulated Brillouin Scattering (SBS) are main limitations of these laser sources due to high power in fiber core. A first amplifier in single-frequency operation with 50W of output power from a laser diode seeder of 50 mW was developed. Study of intensity noise on this amplifier developed with standard fiber (core diameter less than 20 μm) showed that SBS leads to a degradation of noise properties of the laser. The use of large mode area (LMA) fibers is a solution for suppressing nonlinear effects with core diameters bigger than several tens of microns. LMA fibers show an overlap between doped core and pump wave optimized leading to a reduction of gain medium length. This strategy permits to increase nonlinear effect threshold. Second step of high power amplifiers with LMA fibers allows to obtain 100W in single-frequency regime without DBS. LMA fiber used have a core diameter equals to 40μm. Power scaling from 100W to 200W highlights a new limiting non-linear effect: Fiber Modal Degradation (FMD). Indeed, multimodal cores of these fibers, coupled to high thermal load lead to non-linear effects like Modal Instabilities (IM) and FMD. FMD effect, first described by Ward et al in 2016, is a thermo-optic effect characterized by a beam quality degradation with power transfer from fundamental mode to high order modes. Furthermore, a decrease of output power, synonym of guidance loss of fundamental mode in gain medium is observed. Unlike well-known effect IM, this phenomenon doesn’t act like a threshold phenomenon. In fact, transitory regime in association with FMD is longer than IM caused by photodarkening dynamic. In our study, beam quality at the output of the fiber was degraded after several tens of hours at 200W. For understanding this effect, a photodarkening effect study both in continuous wave (CW) and pulsed regime was carried out. This study shows that for the first time a photodarkening and photobleaching equilibrium on high power amplifiers in pulsed regime. These thermo-induced effects threshold depends on thermal load and are different for both regimes: 120W for CW and 150W for pulsed regime. Finally, a study and a reduction of intensity noise based from a servo-loop were carried out on 100W amplifier. A 1MHz bandwidth with a 30 dB decrease of noise were demonstrated. These results allow to develop high power and low intensity noise lasers at industrial level”
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Ahmad, Mahmoud Mohamed Mahmoud [Verfasser]. "Highly Sensitive Sensor Based On Intracavity Laser Absorption Spectroscopy By Means of Relative Intensity Noise / Mahmoud Mohamed Mahmoud Ahmad." Kassel : Universitätsbibliothek Kassel, 2011. http://d-nb.info/1009650874/34.

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Audo, Kevin. "Étude théorique et expérimentale des lasers solides bi-fréquences auto-régulés en bruit d'intensité via des non-linéarités intracavité." Thesis, Rennes 1, 2018. http://www.theses.fr/2018REN1S002/document.

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Les lasers à état solide bi-fréquences constituent des sources de choix pour de nombreux domaines (métrologie, photonique micro-onde, Lidar-Radar, horloges atomiques). Cependant, de tels lasers souffrent d'excès de bruit d'intensité difficiles à supprimer avec les méthodes habituelles. Dans ce contexte, nous développons une nouvelle approche baptisée « buffer reservoir » pour la réduction de l'excès de bruit d'intensité des lasers à état solide. Cette méthode repose sur le changement du comportement dynamique du laser par insertion d'un mécanisme d'absorption non-linéaire faiblement efficace dans la cavité. Tout d'abord, nous étudions cette approche dans des lasers solides mono-fréquence en exploitant deux types d'absorption non-linéaire : l'absorption à deux photons (TPA) et l'absorption par génération de seconde harmonique (SHGA). Nous montrons qu'il est possible de réduire de 50 dB le bruit d'intensité à la fréquence des oscillations de relaxation d'un laser Er,Yb:verre sans en dégrader la puissance de sortie ni le bruit de phase. Nous explorons les mécanismes physiques sous-jacents en développant un modèle analytique décrivant le comportement dynamique du laser. L'effet de l'absorbant non-linéaire sur les pics de bruit à haute fréquence à l'intervalle spectrale libre de la cavité est également étudié. Nous démontrons l'intérêt de telles sources lasers auto-régulées en intensité pour la distribution d'oscillateurs locaux sur porteuse optique. Nous mettons ensuite en application l'approche « buffer reservoir » dans des lasers bi fréquences. En développant un modèle analytique prédictif, nous montrons expérimentalement que l'utilisation de TPA engendre, sous certaines conditions, une réduction de 40 dB de l'amplitude des pics de bruit en-phase et en anti-phase. Nous vérifions en outre les propriétés de couplage des modes dans le milieu actif lorsque les pertes non-linéaires sont présentes. Enfin, nous abordons l'utilisation de SHGA comme ''buffer reservoir'' dans les lasers bi-fréquences. Plus particulièrement, nous explorons expérimentalement et théoriquement le comportement du laser lorsque les pertes non-linéaires ne sont introduites que sur un seul mode propre du laser. Dans cette configuration, nous montrons qu'il est possible d'obtenir pour les deux modes à la fois une forte diminution des pics de bruit d'intensité résonants
Dual-frequency solid-state lasers are attractive for numerous domains (metrology, microwave photonics, Lidar-Radar, optical clocks). However, such lasers suffer from excess intensity noise which is difficult to cancel with usual methods. In this context, we develop a new approach called “buffer reservoir” for reducing the excess intensity noise. This method relies on the change of the laser’s dynamical behavior by inserting a low efficient nonlinear absorption mechanism in the cavity. First, this approach is studied on single frequency solid-state lasers by using two types of non-linear absorption: two-photon absorption (TPA) and second harmonic generation absorption (SHGA). We show a possible reduction of the intensity noise at the relaxation oscillations frequency of an Er,Yb:glass laser up to 50 dB without degrading neither its power nor its phase noise. We explore the underlying physics by developing an analytical model describing the laser dynamical behavior. The effect of the nonlinear absorber on the noise peaks lying at high frequency at the free spectral range of the cavity is also studied. We demonstrate the relevance of such self-regulated lasers for the distribution of optically carried local oscillators. We then extend the “buffer reservoir” approach to dual-frequency lasers. By developing a predictive analytical model, we show experimentally that the use of TPA enables 40 dB reduction of both in-phase and anti-phase noise under certain conditions. The mode coupling in the active medium is analyzed when the nonlinear losses are present. Finally, we address the use of SHGA as a ''buffer reservoir'' in dual-frequency lasers. In particular, we experimentally and theoretically explore the laser behavior when the nonlinear losses are inserted on one eigen-mode of the laser only. This configuration enables a strong reduction of resonant noise peaks for both modes
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Ceppe, Jean-Baptiste. "Éléments de dynamique du laser pour l'élaboration d'une source micro-onde miniaturisée sur la base de la double émission monomode d'un laser à mode de galerie." Thesis, Rennes 1, 2018. http://www.theses.fr/2018REN1S067/document.

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Ces travaux de thèses portent sur l’étude de la dynamique du laser à mode de galerie dans le but de réaliser une source micro-onde en utilisant un laser à mode de galerie doublement monomode. Nous montrons ici les résultats expérimentaux sur le bruit relatif d’intensité (RIN) d’un laser à mode de galerie en verre ZBLALiP dopé aux ions Er3+. Outre l’aspect performances d’utilisation du laser, le spectre de RIN donne un certain nombre d’informations sur la dynamique du laser (temps de vie des photons, taux de pompage effectif, sources de bruit, ...).Les très forts facteur de qualités de ces résonateurs ainsi que leurs propriétés de confinement spatial amène un couplage non-linéaire etre les photons et les atomes du milieu amplificateur, faisant apparaitre dans le spectre de RIN des harmoniques de la fréquence de relaxation du laser. Le modèle harmonique développé permet d’estimer le volume de mode du mode de galerie en régime laser, quantité difficilement estimable dans ce régime d’émission. D’autre part, les mesures de RIN réalisées sur un verre industriel IOG-1 codopé Yb3+/Er3+ montrent la signature d’un couplage modal, induit par la diffusion Rayleigh, où les deux modes couplés fonctionnent au dessus du seuil laser. La dynamique de ce laser est également étudié et les comportements obtenus sont mis en parallèle avec les études réalisées sur le gyro-Laser à l’état solide
This thesis presents the studies of whispering gallery mode laser dynamics in order to realize a micro-wave source using simultaneous oscillations in a unique whispering gallery mode micro-laser. We show experimental results on the relative intensity noise (RIN) of a Whispering Gallery Mode Laser in ZBLALiP glass doped with Er3+ ions. Besides the pure laser specifications, the RIN spectrum gives informations about the dynamics inside the cavity, such as photon lifetime, effective pumping rate and noise sources. Moreover, we have shown that a single-mode emission comes with the presence of multiple harmonics of the relaxation frequency. The theoretical model taking account the non-linear coupling between photons and atoms allows us to determine the mode volume of the whispering gallery mode in laser regime, which is quite difficult to evaluate in this regime. On the other hand, we have studied the laser dynamics in an industrial IOG-1 glass codoped with Yb3+/Er3+ ions where the signature of a modal coupling, induced by Rayleigh scattering, lies in the RIN spectrum. In this particular case, the two coupled modes operate above threshold. The observed behavior is compared with thoses of a solid state gyro-laser
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Collin, Rodolphe. "Étude du transfert du bruit relatif d’intensité de lasers multimodes par doublage de fréquence." Thesis, Rennes 1, 2019. http://www.theses.fr/2019REN1S128.

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Le développement de nouvelles sources laser est un travail long et minutieux. Une grande variété de paramètres doit être étudiée et maîtrisée pour parvenir aux performances souhaitées. Dans cette étude, nous nous sommes intéressés au bruit relatif d'intensité (Relative Intensity Noise ou RIN) de différents lasers. Nous avons en particulier étudié le processus de doublage de fréquence et son influence sur le RIN. Pour les besoins de cette étude, un modèle numérique de simulation d'un laser à fibre en fonctionnement multimode longitudinal a été développé. Il prend en compte des caractéristiques nécessaires à notre étude : la résolution du champ laser en amplitude et phase, le fonctionnement multimode, le spatial hole burning et l'introduction de sources de bruit via l'ajout de forces de Langevin. L'étude du RIN après doublage de fréquence, prise en compte par la mise au carré du champ résultant de la résolution de notre modèle numérique, a montré trois processus différents menant à une augmentation du RIN à basse fréquence après doublage : un couplage entre les RIN les plus faibles et les intensités les plus fortes, la compétition entre les modes et un transfert de bruit de phase sur le bruit d'intensité. Enfin, nous avons étendu notre étude au cas des lasers à semi-conducteurs. En utilisant un modèle de simulations numériques préexistant, nous avons étudié le RIN après doublage de fréquence d'un laser à semi-conducteurs dans trois régimes de fonctionnement différents. Cette étude a pu confirmer la fiabilité de l'analyse développée dans le cadre d'un laser à fibre et montrer les différences entre les architectures laser étudiées
Developing a new laser source is a meticulous and time-consuming work. A large variety of parameters must be studied to obtain the wanted performances. In this work, we focused on the Relative Intensity Noise (RIN) of different lasers. Especially, we studied the second harmonic generation process and its influence on the laser RIN. For the needs of this work, we developed a numerical simulation model of a multimode fibre laser. It takes into account some needed features: the resolution of the laser field with amplitude and phase, the multimode behaviour, the spatial hole burning effect and the introduction of noise sources by adding Langevin forces. Studying the RIN after frequency doubling is done by squaring the field obtained by our numerical simulation. We found three different processes leading to an increase of the RIN at low frequencies after frequency doubling: a coupling between the less-noisy modes and the most-intense ones, the mode competition at low frequencies and, a transfer of the phase noise to the intensity noise. We have extended our study to semiconductor lasers. We used a pre-existing numerical simulation model and studied the RIN after frequency doubling for three different operating regimes. This study did confirm the reliability of the analysis developed in the fibre laser case and showed some differences between both lasers
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10

Fresnel, Schadrac. "Lasers à fibre Brillouin multi-stokes : cohérence et caractérisation en bruit." Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1S032/document.

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La diffusion Brillouin est la diffusion inélastique de la lumière par les ondes acoustiques d'un milieu. Dans une fibre optique, la diffusion Brillouin stimulée (DBS) se manifeste, à partir d'une certaine intensité lumineuse incidente (Pompe), par la génération d'une onde Stokes rétrodiffusée dont la fréquence est décalée de celle de la Pompe d'une valeur directement proportionnelle à la vitesse de propagation des ondes acoustiques. Le décalage Brillouin présente une grande sensibilité à tous les effets qui peuvent modifier la vitesse de l'onde acoustique. Cette propriété permet d'étudier la composition des fibres et confère à la DBS la potentialité pour la réalisation de capteurs à fibres optiques. Le processus de DBS s'accompagne aussi d'un gain pour l'onde Stokes rétrodiffusée, puisque presque toute la puissance de l'onde Pompe y est transférée. Il peut donc être utilisé pour la réalisation d'amplificateurs et de lasers à fibres optiques. Dans le cadre de ce travail de thèse, nous avons étudié expérimentalement les propriétés statiques et dynamiques du laser à fibre Brillouin (LFB). Dépendamment du taux d'amortissement de l'onde acoustique et du taux de pertes de la cavité, le LFB peut être très cohérent et très peu bruité, favorisant ainsi son utilisation dans de multiples domaines comme la défense, la métrologie et les télécommunications. Lorsque la Pompe ne fait qu'un tour dans la cavité Brillouin, le LFB étudié présente un bruit de fréquence 10 000 fois plus faible que celui du laser de Pompe tout en gardant un bruit d'intensité similaire. Lorsque la Pompe est résonante, il est possible d'obtenir un LFB à multiples ondes Stokes en cascadant l'effet non-linéaire Brillouin dans la fibre optique. Limités par nos bancs de mesures, nous avons mesuré un bruit de fréquence 1 000 fois plus faible que celui de la Pompe et un bruit d'intensité plus de 100 fois plus faible
Brillouin scattering is the inelastic scattering of light by the acoustic waves of a medium. In an optical fiber, stimulated Brillouin scattering occurs, from a certain incident light intensity (pump), for generating a backscattered "Stokes" wave, whose frequency is shifted from that of the pump by a value directly proportional to the acoustic wave propagation velocity in the fiber. The Brillouin shift has a high sensitivity to all effects that can change the speed of the acoustic wave. This property makes it possible to study the composition of the fibers and gives to the SBS the potential for the production of optical fiber sensors. The SBS process is also accompanied by a gain for the backscattered Stokes wave since almost all the power of the Pump wave is transferred there. It can, therefore, be used for the production of optical fiber amplifiers and lasers. As part of this thesis work, we experimentally studied static and dynamic properties of the Brillouin fiber lasers (BFLs). Depending on the damping rate of the acoustic wave and the loss rate of the cavity, the BFL can be very coherent and less noisy, thus promoting its use in multiple fields such as defense, metrology, and telecommunications. When the Pump makes only one turn in the Brillouin cavity, the studied BFL has a frequency noise 10,000 times lower than that of the Pump laser while keeping a similar intensity noise. When the Pump is resonant, it is possible to obtain a BFL with multiple Stokes waves by cascading the Brillouin non-linear effect in the optical fiber. Restricted by our measurement benches, we measured a frequency noise 1000 times lower than that of the Pump and an intensity noise more than 100 times lower
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Books on the topic "Laser intensity noise"

1

Dahl, M. D. Noise from supersonic coaxial jets. [Washington, DC: National Aeronautics and Space Administration, 1997.

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Dahl, M. D. Noise from supersonic coaxial jets. [Washington, DC: National Aeronautics and Space Administration, 1997.

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Dahl, M. D. Noise from supersonic coaxial jets. [Washington, DC: National Aeronautics and Space Administration, 1997.

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Dahl, M. D. Noise from supersonic coaxial jets. [Washington, DC: National Aeronautics and Space Administration, 1997.

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J, Morris P., and United States. National Aeronautics and Space Administration., eds. Noise from supersonic coaxial jets. [Washington, DC: National Aeronautics and Space Administration, 1997.

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J, Morris P., and United States. National Aeronautics and Space Administration., eds. Noise from supersonic coaxial jets. [Washington, DC: National Aeronautics and Space Administration, 1997.

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Book chapters on the topic "Laser intensity noise"

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Harb, Charles C., Timothy C. Ralph, David E. McClelland, Hans-A. Bachor, Ingo Freitag, Andreas Tünnermann, and Herbert Welling. "Solid State Laser Intensity Noise Reduction." In Laser in Forschung und Technik / Laser in Research and Engineering, 22–25. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-80263-8_3.

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Petermann, K. "Intensity-Modulation Characteristics of Laser Diodes." In Laser Diode Modulation and Noise, 78–118. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-2907-4_4.

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Giacobino, E., C. Fabre, H. Heidmann, R. Horowicz, S. Reynaud, and G. Camy. "Squeezing Intensity Noise on Laser-like Beams." In Laser Spectroscopy VIII, 154–55. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-540-47973-4_40.

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Grangier, P., J. PH Poizat, T. C. Zhang, F. Marin, A. Bramati, and E. Giacobino. "Quantum Intensity Noise of Laser Diodes." In Microcavities and Photonic Bandgaps: Physics and Applications, 477–88. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0313-5_44.

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Kim, Jungsang, Seema Somani, and Yoshihisa Yamamoto. "Excess Intensity Noise of a Semiconductor Laser with Nonlinear Gain and Loss." In Nonclassical Light from Semiconductor Lasers and LEDs, 57–75. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-56814-5_5.

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Keller, Ursula. "Intensity Noise and Timing Jitter of Modelocked Lasers." In Ultrafast Lasers, 589–637. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-82532-4_11.

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Noriega, J. M., L. Pesquera, M. A. Rodríguez, J. Casademunt, and A. Hernández-Machado. "Analysis of the Decay of Intensity Correlation Functions for the Gain-Noise Model of Dye Lasers." In Springer Proceedings in Physics, 313–17. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-76373-1_39.

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Wu, M. S., L. A. Buckman, G. S. Li, K. Y. Lau, and C. J. Chang-Hasnain. "Polarization Induced Enhancement of Relative Intensity Noise and Modulation Distortion of Vertical Cavity Surface Emitting Lasers." In Guided-Wave Optoelectronics, 59–65. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4899-1039-4_10.

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Zhu, Ping. "Dynamical Properties of Intensity Fluctuation of Saturation Laser Model Driven by Cross-Correlated Additive and Multiplicative Noises." In Dynamical Systems, 233–49. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-1-4419-5754-2_20.

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Liu, Xiaolong, Jushang Li, Ruitong Zhang, Hongjie Jiang, Xikuan Chen, Jihao Cheng, and Fucheng Liu. "Transient Quantitative Identification Algorithm Based on Laser Impulse Response." In Proceedings of the 2022 International Conference on Smart Manufacturing and Material Processing (SMMP2022). IOS Press, 2022. http://dx.doi.org/10.3233/atde220835.

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In order to improve the measurement accuracy of transient heat flow based on laser pulse response technology, a dynamic calibration algorithm of heat flow based on pulse response of fiber semiconductor laser is proposed. The system uses a high-power fiber semiconductor laser to generate modulated excitation, and quantitatively detects the transient heat flow energy in the form of pulsed radiation. The light intensity of the light source is adjusted by the homogenization of the light spot, and the energy measurement is completed with a Gardon meter. The data acquisition card and signal analysis circuit are used to realize the high-speed calculation and acquisition of the heat flow signal. Using the transient quantitative identification algorithm, the dynamic test performance of a circular foil heat flow meter of the GD series is tested and calibrated. The simulation analysis of the system’s ability to modulate the signal verifies the feasibility of the system’s light source modulation. A transient quantitative identification system based on high-power fiber semiconductor lasers is established in the experiment. The data curve noise after passing this algorithm is smaller and the accuracy is higher, which verifies the effectiveness of the algorithm. The algorithm can be applied to the field of rapid quantitative identification and analysis of transient heat flow energy.
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Conference papers on the topic "Laser intensity noise"

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Yamada, Minoru, and Tatsuya Nakamori. "Intensity noise in microcavity semiconductor laser." In Photonics West '95, edited by Marek Osinski and Weng W. Chow. SPIE, 1995. http://dx.doi.org/10.1117/12.212528.

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Zhong, Jingchang, Baoren Zhu, Ronghui Li, and Yingjie Zhao. "Measurement of relative intensity noise of semiconductor laser arrays." In OE/LASE'93: Optics, Electro-Optics, & Laser Applications in Science& Engineering, edited by Daniel Renner. SPIE, 1993. http://dx.doi.org/10.1117/12.146926.

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Ivanov, E. N., and L. Hollberg. "Wide-Band Suppression of Laser Intensity Noise." In 2007 IEEE International Frequency Control Symposium Joint with the 21st European Frequency and Time Forum. IEEE, 2007. http://dx.doi.org/10.1109/freq.2007.4319246.

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Rubiola, Enrico, Kirill Volyanskiy, and Laurent Larger. "Measurement of the laser relative intensity noise." In 2009 Joint Meeting of the European Frequency and Time Forum (EFTF) and the IEEE International Frequency Control Symposium (FCS). IEEE, 2009. http://dx.doi.org/10.1109/freq.2009.5168140.

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Yi, Jong Chang, Hyung Uk Cho, Jong Dae Kim, Massimo Macucci, and Giovanni Basso. "Investigation of Intensity and Phase Feedback Effects on the Relative Intensity Noise in Blue Laser Diodes under High Frequency Modulation." In NOISE AND FLUCTUATIONS: 20th International Conference on Noice and Fluctuations (ICNF-2009). AIP, 2009. http://dx.doi.org/10.1063/1.3140475.

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Guggenmos, Joel. "Minimization Of Laser Diode Relative Intensity Noise (RIN)." In OE/LASE '89, edited by Bernard D. Seery. SPIE, 1989. http://dx.doi.org/10.1117/12.951301.

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Mørk, Jesper. "Squeezing of intensity noise in semiconductor nanolasers and nanoLEDs with extreme confinement of light." In Semiconductor Lasers and Laser Dynamics X, edited by Krassimir Panajotov, Marc Sciamanna, and Sven Höfling. SPIE, 2022. http://dx.doi.org/10.1117/12.2624597.

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Cunefare, Kenneth A., and Ryan Rye. "Investigation of Disc Brake Squeal via Sound Intensity and Laser Vibrometry." In SAE 2001 Noise & Vibration Conference & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2001. http://dx.doi.org/10.4271/2001-01-1604.

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Poette, J., O. Vaudel, and P. Besnard. "Relative intensity noise of an injected semiconductor laser." In SPIE Proceedings, edited by Guenter Huber, Vladislav Y. Panchenko, and Ivan A. Scherbakov. SPIE, 2005. http://dx.doi.org/10.1117/12.660527.

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Cheng, Xin, Weiwei Pan, Jinyan Dong, Xiaohu Fu, and Yan Feng. "Relative Intensity Noise Measurement of a Fiber Laser." In 2019 18th International Conference on Optical Communications and Networks (ICOCN). IEEE, 2019. http://dx.doi.org/10.1109/icocn.2019.8933951.

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Reports on the topic "Laser intensity noise"

1

Camparo, J. C., and P. Lambropoulos. Quantum-Mechanical Interference Between Optical Transitions: The Effect of Laser Intensity Noise. Fort Belvoir, VA: Defense Technical Information Center, May 1999. http://dx.doi.org/10.21236/ada363838.

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