Relevant bibliographies by topics / Fibre Laser

Academic literature on the topic 'Fibre Laser'

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Published: 4 June 2021
Last updated: 31 January 2023

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Journal articles on the topic "Fibre Laser"

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McCaffer, C. J., L. Pabla, and C. Watson. "Curved adjustable fibre-optic diode laser in microscopic cholesteatoma surgery: description of use and review of the relevant literature." Journal of Laryngology & Otology 132, no. 4 (March 8, 2018): 360–63. http://dx.doi.org/10.1017/s0022215118000117.

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AbstractObjective:The use of lasers in cholesteatoma surgery is common and well accepted. The most commonly used laser fibres are straight and non-adjustable; these have several limitations. This paper describes the use of an alternative laser fibre.Method:This ‘How I Do It’ paper describes and illustrates the use of an alternative curved adjustable fibre-optic diode laser in microscopic cholesteatoma surgery.Results:The curved, adjustable laser fibre allows accurate and atraumatic disease removal when the use of a straight laser fibre may be less effective or accurate. It reduces potential damage to delicate structures without the need for extra drilling or bone removal.Conclusion:It is suggested that the curved adjustable laser fibre is superior to the traditional straight fibre for cholesteatoma surgery.
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He, Wentao, and Zhiwei Men. "Analysis on Transmission Characteristics of Stimulated Raman Scattering Based on the Multi-Sensor Signal Enhancement Technique." Scientific Programming 2022 (May 11, 2022): 1–9. http://dx.doi.org/10.1155/2022/5726718.

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In recent 20 years, fibre laser system has been developed rapidly and widely used for its high quality, high efficiency, high robustness, and compactness. However, there are still many factors (such as non-linear effect, thermal effect, and mode instability) that limit the further increase of power of fibre laser system. Stimulated Raman scattering (SRS) is one of the main limitations in the transmission process of fibre lasers. It not only reduces the output efficiency of fibre lasers, but also increases the damage risk of reverse Stokes light to the system. Recent studies have shown that SRS in low-mode fibres can lead to quasi-static mode degradation in addition to mode instability. With the introduction of multi-sensor enhancement technology in the fibre field, it becomes an effective means to popularise high-power and high-beam quality fibre lasers. Based on the multi-sensor signal enhancement technology, this paper explores the influence of this technology on the output efficiency of SRS in the mode-reducing fibre laser, which provides a new idea and method for the output efficiency and transmission analysis method of fibre laser.
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Popov, S. M., O. V. Butov, A. O. Kolosovskii, V. V. Voloshin, I. L. Vorob’ev, V. A. Isaev, D. V. Ryakhovskii, et al. "Optical fibres with an inscribed fibre Bragg grating array for sensor systems and random lasers." Quantum Electronics 51, no. 12 (December 1, 2021): 1101–6. http://dx.doi.org/10.1070/qel17659.

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Abstract We report the latest results on inscribing extended fibre Bragg grating (FBG) arrays upon fibre drawing, obtained at the Kotelnikov Institute of Radioengineering and Electronics of RAS. The properties of these structures are considered, and examples of their application in sensor systems of microwave dense wavelength multiplexing and as a basis for designing single-frequency fibre lasers are considered. The optical and laser characteristics of FBG arrays, inscribed (using 248-nm UV laser radiation) both in standard single-mode telecommunication fibres of the SMF-28 type and in erbium-doped active fibres, are investigated.
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Franczyk, Marcin, Dariusz Pysz, Filip Włodarczyk, Ireneusz Kujawa, and Ryszard Buczyński. "Yb3+ doped single-mode silica fibre laser system for high peak power applications." Photonics Letters of Poland 12, no. 4 (December 31, 2020): 118. http://dx.doi.org/10.4302/plp.v12i4.1075.

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We present ytterbium doped silica single-mode fibre components for high power and high energy laser applications. We developed in-house the fibre laser with high efficiency of 65% according to the launched power, the threshold of 1.16W and the fibre length of 20 m. We also elaborated the fibre with 20 µm in diameter core suitable for amplifying the beam generated in oscillator. We implemented made in-house endcaps to prove the utility of the fibre towards high peak power applications. Full Text: PDF ReferencesStrategies Unlimited, The Worldwide Market for Lasers: Market Review and Forecast, 2020 DirectLink J. Zhu, P. Zhou, Y. Ma, X. Xu, and Z. Liu, "Power scaling analysis of tandem-pumped Yb-doped fiber lasers and amplifiers", Opt. Express 19, 18645 (2011) CrossRef IPG Photonics, Product information, accessed: October, 2020. DirectLink J.W. Dawson, M. J. Messerly, R. J. Beach, M. Y. Shverdin, E. A. Stappaerts, A. K. Sridharan, P. H. Pax, J. E. Heebner, C. W. Siders, and C. P. J. Barty, "Analysis of the scalability of diffraction-limited fiber lasers and amplifiers to high average power", Opt. Express 16, 13240 (2008) CrossRef W. Koechner, "Solid-State Laser Engineering", Springer Series in Optical Science, Berlin 1999 CrossRef A. V. Smith, and B. T. Do, "Bulk and surface laser damage of silica by picosecond and nanosecond pulses at 1064 nm", Appl. Opt. 47, 4812 (2008), CrossRef M. N. Zervas, C. Codemard, "High Power Fiber Lasers: A Review", IEEE J. Sel. Top. Quantum Electron. 20, 1, 2014 CrossRef D.J. Richardson, J. Nilsson, and W.A. Clarkson, "High power fiber lasers: current status and future perspectives [Invited]", J. Opt. Soc. Am. B, 27, 63, 2010, CrossRef M. Li, X. Chen, A. Liu, S. Gray, J. Wang, D. T. Walton; L. A. Zenteno, "Limit of Effective Area for Single-Mode Operation in Step-Index Large Mode Area Laser Fibers", J. Lightw. Technol., 27, 3010, 2009, CrossRef J. Limpert, S. Hofer, A. Liem, H. Zellmer, A. Tunnermann., S. Knoke, and H. Voelckel, "100-W average-power, high-energy nanosecond fiber amplifier", App.Phys.B 75, 477, 2002, CrossRef
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Kutin, A. A., and M. V. Turkin. "Advanced Fiber Laser Perforation Technology for Thermoplastic Pre-Preg Material." Key Engineering Materials 496 (December 2011): 36–43. http://dx.doi.org/10.4028/www.scientific.net/kem.496.36.

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A study concerning the application of fiber laser to perforate thermoplastic pre-pregs is presented. An IPG fiber laser was used to drill arrays of holes in PEKK carbon-fiber composite pre-preg material. Perforated holes were of the order of 100μm. The effects of laser perforation process parameters including the number of pulses on the geometry of the resultant holes and the thermal damage to the matrix and fibres have been investigated. Dimensional analysis and experimental results have been used to construct the laser perforation process model. Keywords: Laser perforation; Fibre laser; Process modelling; Polymer matrix composites.
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Hennings, T., D. Hennings, and C. Lindsay. "Thrombus formation using endovenous lasers: an in vitro experiment." Phlebology: The Journal of Venous Disease 29, no. 3 (May 6, 2013): 171–78. http://dx.doi.org/10.1177/0268355512473921.

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Objectives: The purpose of these experiments was to simulate thrombus formation during endovenous laser closure by measuring coagulum formation of in vitro laser exposures in porcine blood and investigate the role of procedures and equipment in thrombus formation. Methods: Continuous wave 810, 940, 980, 1310 and 1470 nm lasers and microsecond pulsed wave 1064 nm Nd:YAG (neodymium-doped yttrium aluminium garnet), 1320 nm Nd:YAG and 2100 nm THC:YAG (thulium holmium chromium-doped yttrium aluminium garnet) lasers were tested with standard fibres with diameters of 365, 550 and 600 μm as well as two prototype modified tip fibres. Results: The results show that pulsed lasers with high-peak power densities form less coagulum. Fibre specifications were found not to influence coagulum formation, and prototype modified tip fibres designed to prevent contact between the fibre tip and the vein wall did not eliminate coagulum formation. Conclusion: Microsecond-pulsed wave lasers with high-peak power densities may be a better choice to minimize soft thrombus formation during endovenous laser ablation treatments.
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Michalska, Maria, Paweł Grześ, and Jacek Swiderski. "High power, 100 W-class, thulium-doped all-fiber lasers." Photonics Letters of Poland 11, no. 4 (December 31, 2019): 109. http://dx.doi.org/10.4302/plp.v11i4.953.

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In this work, sub-kilowatt, compact thulium-doped fiber laser systems, operating at a wavelength of 1940 nm, have been presented. The continuous-wave laser power generated out of a single oscillator was 90 W with a slope efficiency of 56.7%. Applying a master oscillator – power amplifier configuration, an output power of 120.5 W with a slope efficiency of 58.2% was demonstrated. These are the first results of the works aimed at developing kW-class “eye-safe” laser systems in Poland. Full Text: PDF ReferencesZ. Liu, et al., "Implementing termination analysis on quantum programming", Sci. China Inf. Sci. 62, 41301 (2019) CrossRef S. D. Jackson, A. Sabella, D.G Lancaster, "Application and Development of High-Power and Highly Efficient Silica-Based Fiber Lasers Operating at 2 μm", IEEE J. Sel. Top. Quantum Electron. 13, 567, (2007). CrossRef E. Russell, N. Kavanagh, K. Shortiss, and F. C. G. Gunning, "Development of thulium-doped fibre amplifiers for the 2μm waveband", Proc. SPIE 10683, 106832Q (2018) CrossRef P. Peterka, B. Faure, W. Blanc, M. Karásek, and B. Dussardier, "Theoretical modelling of S-band thulium-doped silica fibre amplifiers", Opt. Quantum Electron. 36, 201 (2004) CrossRef M. Eichhorn, "Pulsed 2 μm fiber lasers for direct and pumping applications in defence and security", Proc. SPIE 7836, 78360B (2010). CrossRef O. Traxer and E. X. Keller, "Thulium fiber laser: the new player for kidney stone treatment? A comparison with Holmium:YAG laser", World J. Urol. 2019 Feb 6. doi: 10.1007/s00345-019-02654-5 CrossRef S. Das, "Optical parametric oscillator: status of tunable radiation in mid-IR to IR spectral range based on ZnGeP2 crystal pumped by solid state lasers", Opt. Quant. Electron. 51, 70 (2019) CrossRef M. Michalska, P. Hlubina, and J. Swiderski, "Mid-infrared Supercontinuum Generation to ∼4.7 μm in a ZBLAN Fiber Pumped by an Optical Parametric Generator", IEEE Photon. J 9, 3200207 (2017) CrossRef https://www.ipgphotonics.com DirectLink M.D. Burns, P. C. Shardlow, P. Barua, T. L. Jefferson-Brain, J. K. Sahu, and W. A.Clarkson, "47 W continuous-wave 1726 nm thulium fiber laser core-pumped by an erbium fiber laser", Opt. Lett. 44, 5230 (2019) CrossRef S.D. Jackson, "Cross relaxation and energy transfer upconversion processes relevant to the functioning of 2 μm Tm3+-doped silica fibre lasers", Opt. Commun. 230, 197 (2004). CrossRef X. Wang, P. Zhou, X. Wang, H. Xiao, and L. Si, "102 W monolithic single frequency Tm-doped fiber MOPA", Opt. Express 21, 32386 (2013) CrossRef K. Yin, R. Zhu, B. Zhang, G. Liu, P. Zhou, and J. Hou, "300 W-level, wavelength-widely-tunable, all-fiber integrated thulium-doped fiber laser", Opt. Express 24, 11085 (2016) CrossRef G. D. Goodno, L. D. Book, and J. E. Rothenberg, "600-W, single-mode, single-frequency thulium fibre laser amplifier", Proc. SPIE 7195, 71950Y (2009). CrossRef T. Ehrenreich, R. Leveille, I. Majid, K. Tankala, G. Rines, and P. Moulton, "1-kW, all-glass Tm: fiber laser", Proc. SPIE 7580, 1 (2010) DirectLink M. Michalska et al., "Highly stable, efficient Tm-doped fiber laser—a potential scalpel for low invasive surgery", Laser Phys. Lett. 13, 115101 (2016). CrossRef
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8

Ivanenko, A. V., B. N. Nyushkov, and S. V. Smirnov. "Generation of high-energy single pulses and pulse clusters in ytterbium fibre lasers with quasi-synchronous modulation of the pump power." Quantum Electronics 51, no. 12 (December 1, 2021): 1061–67. http://dx.doi.org/10.1070/qel17653.

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Abstract Additional capabilities of the method of quasi-synchronous pump power modulation developed by the authors for nanosecond high-energy pulsed oscillation of fibre lasers with a long-lived (about 1 ms) upper laser level are investigated. Using an Yb fibre laser as an example, it is shown that quasi-synchronous pump power modulation makes it possible to generate not only a periodic sequence of single nanosecond pulses, but also regular pulse clusters with a controlled number of nanosecond subpulses that make up a cluster. In addition, the feasibility of scaling the energy of laser pulses obtained by the method of quasi-synchronous modulation of the pump power is studied when proceeding to the use of active double-clad fibres and higher-power multimode pump sources. Pulses with energies up to 430 nJ are obtained in a laser configuration maintaining linear polarisation of radiation. The results obtained significantly expand the possibilities of applying the method of quasi-synchronous modulation of the pump power in conventional fibre lasers based on stimulated emission.
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9

Lekich, C., and P. Hannah. "Retained laser fibre: insights and management." Phlebology: The Journal of Venous Disease 29, no. 5 (March 28, 2013): 318–24. http://dx.doi.org/10.1177/0268355513483957.

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Objectives: To describe a case of retained endovenous laser fibre. To review the literature and Food and Drug Administration device failure reports. To suggest protocols for avoiding this complication and a method of removal. Methods: A case of retained fibre removal is described. Fibre removal techniques in vivo and ex vivo in a bovine model on the laboratory bench are presented. Results: Successful in vivo and ex vivo fibre removal was performed using duplex ultrasound scan guided phlebectomy techniques. Unexplained measured fibre-length discrepancies due to misleading manufacturer's packaging was discovered. Conclusions: Simple ultrasound-guided micro-phlebectomy techniques can be used to remove retained laser fibres in the office environment. Laser fibre length measurements before and after treatment are recommended. Some preventive guidelines are described to avoid, or at least diagnose immediately, this complication, such as the ‘Laser Eclipse Sign’.
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Sharp, Martin C., Roopesh Yadav, Andre Batako, and Paul W. French. "Fibre Laser Cleaning of Grinding Wheels." Key Engineering Materials 496 (December 2011): 55–60. http://dx.doi.org/10.4028/www.scientific.net/kem.496.55.

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The use of high power laser technology in the cleaning and dressing of grinding wheels has been the subject of several research projects worldwide and over the last 30 years. Several projects have reported beneficial outcomes however the process has not been implemented in production. The arrival of fibre lasers may provide a viable laser source for cleaning, and ultimately dressing, of wheels. This paper reports on some preliminary data confirming this potential and that supports the need for further research effort.
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Dissertations / Theses on the topic "Fibre Laser"

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Magne, Sylvain. "Etat de l'art des lasers à fibre : étude d'un laser à fibre dopée ytterbium et spectroscopie laser de fibres dopées." Saint-Etienne, 1993. http://www.theses.fr/1993STET4027.

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Cette thèse montre l'intérêt de l'amplification optique et des lasers à fibres dopées par des ions de terres-rares pour l'instrumentation et les capteurs à fibres optiques. Nous détaillons les avantages et les inconvénients d'une telle technologie placée dans son contexte d'optique intégrée, ainsi que ses perspectives d'utilisation. Apres rappel de la théorie de la propagation guidée dans les fibres optiques, les technologies permettant de réaliser des fibres optiques dopées sont décrites. Une étude comparative des méthodes d'analyses de préformes et de fibres dopées permettant de déterminer leurs profils de guidage et de dopage est également présentée. Le comportement amplificateur des fibres optiques dopées est ensuite décrit théoriquement en insistant sur les limites fixées par l'élargissement inhomogène de la transition laser. L'évolution du gain intégré de la fibre est mise en évidence en fonction des paramètres influants (longueur, rayon de dopage. . . ) en soulignant l'intérêt d'un rayon de dopage optimisé. Le seuil d'accrochage du laser est modélisé par des équations et des abaques sans dimension déterminant la longueur de fibre optimale en fonction des pertes de la cavité laser. La conception générale du laser à fibre est ensuite synthétisée et les technologies des composants d'optique intégrée adaptés à la fibre amplificatrice le constituant sont comparées. Les techniques expérimentales concernent principalement l'étude de l'accordabilité par excitation sélective de sites et de la limitation du gain par émission stimulée sur la transition de pompage induisant une absorption résiduelle non saturable ; l'étude des effets de transferts dans les fibres dopées par luminescence coopérative : l'étude d'un procédé de changement de valence par irradiation y conduisant à une réduction des ions uranium placés en matrice verre fluoré (zblan) ; la démonstration d'un effet laser à trois niveaux, fonctionnant en régime continu et en contre-réaction externe par réseau
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Leung, Ian Kin-Hay Electrical Engineering &amp Telecommunications Faculty of Engineering UNSW. "Development of composite cavity fibre lasers for fibre laser hydrophone systems." Publisher:University of New South Wales. Electrical Engineering & Telecommunications, 2008. http://handle.unsw.edu.au/1959.4/41248.

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In this thesis, my main focus was to establish a novel composite-cavity fibre laser (CCFL) and to apply it in sensing, particularly in the hydrophone application. The CCFL that I have proposed is formed by writing three wavelength matched fibre Bragg gratings directly into a continuous length of doped fibre. I have also examined the relative advantages and disadvantages of interferometric and intensity-based hydrophone systems, and have established a hydrophone system that can be switched between the two modes of operation, by making use of digital signal processing. I have established a theoretical model to study the lasing and spectral characteristics of the CCFL. My analysis showed that whilst the CCFL have significantly different phase and threshold conditions from the common semiconductor diode lasers with external cavity, the CCFL also have mode-limiting properties that are often sought after. Through simulations, I was able to identify that a non-uniform straining scheme, that is, when one of the sub-cavities of the CCFL is restrained from strain, can improve the sensitivity with respect to existing single cavity fibre lasers, in both the frequency and intensity domains. My simulations also showed that the sensitivity of such a straining scheme can be optimised by tuning the reflectivity of the gratings, sub-cavity lengths, doping concentration and pump power. I have fabricated multiple CCFLs using the in-house grating writing facilities, and have experimentally assessed their power and spectral related lasing characteristics. Whilst having a significantly longer total cavity length compared to typical fibre lasers, the CCFLs demonstrated stable single longitudinal mode operation and narrow linewidth in the order for a few tens of kHz. Asymmetric output power and frequency as a result of unequal sub-cavity lengths were also examined. Finally, I conducted sensing experiments by applying the CCFLs in strain monitoring and intensity-based hydrophone. My results showed that the non-uniform straining scheme had significantly improved the intensity response of the CCFL, and that the acoustic pressure and frequency can be determined by directly sampling and applying Fourier transform to the output intensity of the fibre laser.
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Kabeya, David. "Montée en brillance des réseaux de lasers à fibre : Nouvelle approche par diagnostic à contraste de phase dans une boucle d’optimisation." Thesis, Limoges, 2016. http://www.theses.fr/2016LIMO0116/document.

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Les méthodes de combinaison cohérente sont rapidement apparues comme très prometteuses dans la course à la puissance des sources lasers. Cela s’explique par le fait que la puissance autour de l’axe de propagation évolue selon une loi quadratique avec le nombre de faisceaux combinés. Mes premiers travaux ont porté sur la montée en puissance de pompage dans les systèmes de mise en phase passive par auto-organisation. Pour la première fois, nous avons mis en évidence à la fois expérimentalement et numériquement, qu’au-delà du seuil laser, le filtrage spectral intracavité dû à la structure interférométrique du système laser, est un des principaux facteurs limitant l’obtention de qualités de phasage élevées. L’augmentation du nombre d’émetteurs accentue la dégradation de l’efficacité de combinaison avec la montée en puissance, montrant l’incapacité de ce type de méthode à combiner efficacement un grand nombre d’émetteurs lasers de forte puissance. Par la suite, mes travaux ont porté sur l’étude d’une méthode innovante de phasage actif, mise au point à XLIM. Le principe de cette méthode associe un filtrage optique de type contraste de phase, à un algorithme d’optimisation réduisant les écarts de phases entre émetteurs. Les calculs et expériences ont mis en évidence la très faible sensibilité de la méthode au nombre d’émetteurs mis en jeu. Les démonstrations de combinaison cohérente de 7 à 37 émetteurs fibrés délivrant jusqu’à 5W chacun ont été faites. Ce dernier résultat constitue aujourd’hui un record en termes de nombre d’émetteurs combinés de manière active. L’efficacité de combinaison en champ lointain a été estimée à une valeur élevée de 94%, correspondant à une erreur de phase résiduelle d’environ λ/25. Le faible nombre d’itérations d’algorithme nécessaires pour converger a permis de corriger les fluctuations de phase sur une bande d’environ 1kHz
Coherent laser beam combining techniques rapidly appeared highly promising in the field of ultra-high power laser sources. Indeed, the combined intensity around the propagation axis follows a quadratic law with the number of combined emitters. The first part of my work has been focused on passive phasing techniques, based on self-organization properties of coupled lasers. We have shown, both numerically and experimentally, that the intracavity filtering function due to the interferometric nature of the set-up, is an intrinsic reason for combining efficiency decrease far above laser threshold. The decrease goes steeper when the number of combined laser increases, making that kind of system inappropriate for coherently combining a large number of lasers delivering high power. The second part of my work consisted in studying an innovative active phasing method that associates a phase-contrast like filter with an optimization algorithm reducing phase errors between emitters. Both simulations and experiments showed the weak sensitivity of this method to the number of combined emitters. We demonstrated the phasing of 7 to 37 fiber lasers, delivering up to 5W each. To the best of our knowledge, this last result is the highest number of fiber lasers combined with an active phasing method. The combining efficiency has been estimated around 94%, corresponding to a residual phase error of λ/25. The weak number of algorithm iterations needed to reach the in-phase regime offered a bandwidth of approximately 1kHz
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Pannell, C. N. "Fibre-optic laser Doppler velocimetry." Thesis, University of Kent, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383370.

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Hashemzadeh, Majid. "Investigations into fibre laser cutting." Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/14057/.

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Fibre laser cutting of mild steel using oxygen and nitrogen is widely used in industries throughout the world. An IPG YLR-2000 Ytterbium fibre machine with a maximum power of 2 kW and a wavelength of 1.06 µm is used throughout this research. The effects of oxygen and nitrogen as assist gases on the feature of laser cutting process are different in terms of kerf width, surface roughness, heat affected zone and striation pattern. The kerf width in oxygen laser cutting is wider than that for nitrogen. The striation pattern on oxygen cut edge is smoother than that for the nitrogen cut edge. When using oxygen, the cut edge is covered by a fragile oxide layer while this feature is not seen on the nitrogen cut edge. After laser cutting with oxygen, the cut edge is dross free whilst nitrogen cut edge is drossy. Laser piercing is used to generate a starting point for laser cutting. The pierced hole is normally larger than the kerf width, which means that it cannot lie on the cutline. An experimental programme investigating the piercing process as a function of laser and assist gas parameters is presented. Oxygen and nitrogen were used as assist gases, with pressures ranging from 0.3 to 12 bar. The sizes, geometries and piercing time of the holes produced have been analysed. The pierced hole size decreases with increasing gas pressure and increasing laser power. Oxygen assist gas produced larger diameter holes than nitrogen. A new technique is presented which produces pierced holes no larger than the kerf with and would allow the pierced hole to lie on the cut line of the finished product – allowing better material usage. This uses an inclined jet of nitrogen when piercing prior to oxygen assisted cutting. Specific point energy (SPE) is a concept that has been successfully used in laser welding where SPE and power density determine penetration depth. This analysis allows welding carried out by different laser systems to be directly compared. This work investigates if the SPE concept can be applied to laser cutting. Laser cutting of various thicknesses of mild steel, two different optical set ups and three different delivery fibres with a range of powers and translation speeds is done to gain results for numerous different parameter combinations. It is found that the SPE concept is applicable to laser cutting and the following effects noted: for given material thickness and any given value of SPE, cost is decreased by using a larger beam diameter; for given cut sheet thickness, cutting efficiency increases with SPE; for given value of SPE, cutting efficiency increases as material thickness decreases.
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Guionie, Marie. "Lasers à fibres bifréquences bipolarisations : stabilisation et montée en fréquence du battement." Thesis, Rennes 1, 2020. http://www.theses.fr/2020REN1S059.

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Cette étude porte sur les lasers à fibres bifréquences bipolarisations. Le contrôle de la différence de fréquence de ces lasers représente un enjeu important en photonique microonde. En effet, maîtriser le battement permettrait la réalisation de sources compactes et à faible bruit visant des applications de métrologie ou télécom. Nous travaillons ici sur des sources émettant à 1,5 μm, de type DFB ou DBR, soit dopés Er soit co-dopés Er-Yb. Ils présentent une fréquence de battement d'environ 1 GHz pour les DFB, et 100 MHz pour les DBR. Les objectifs de la thèse ont été, d'abord de stabiliser le battement, puis d'explorer différentes méthodes pour modifier la biréfringence de la fibre et ainsi accroître la fréquence de battement. Nous avons d'abord utilisé la méthode de stabilisation par boucle à verrouillage de phase pour asservir le battement sur une fréquence de référence. En nous servant de la diode de pompe comme actuateur, nous avons réussi à stabiliser des battements entre 300 MHz et 10 GHz pendant plusieurs jours. Ensuite, nous avons mis en place une méthode de stabilisation par réinjection optique décalée en fréquence. Un modèle théorique basé sur des équations-bilan couplées a été utilisé et a permis de retrouver les observations expérimentales. En stabilisant le battement sur une référence extérieure, différents régimes dynamiques ont été observés. Dans la zone stable, on réduit le bruit de phase jusqu'à −100 dBc/Hz à 1 kHz de la porteuse. Puis, nous avons couplé le montage de la réinjection optique a une ligne à retard, afin de stabiliser efficacement le battement sur lui-même. Enfin, nous avons étudié plusieurs pistes pour augmenter la fréquence de battement des lasers DBR pour répondre aux besoins des applications. Nous avons pu suivre en temps réel la modification de biréfringence photo-induite par un faisceau UV. Nous avons aussi étudié une méthode de modification réversible de la biréfringence, en exploitant l'effet élasto-optique. Quelque soit la méthode employée, nous avons observé un accroissement de la fréquence de battement depuis 100 MHz jusqu'à plus de 10 GHz dans le meilleur des cas
This work is about dual-polarization dual-frequency fibers lasers. The control of the frequency difference of these lasers is a major challenge in microwave photonics. Controlling the beat frequency could allow compact and low-noise sources, in order to develop applications in metrology or telecom. Here, we focus on 1.5 μm sources, in either DFB or DBR configurations, made of Er-doped or co-doped Er:Yb silica fibres. Their beat frequency is about 1 GHz for DFB lasers, and 100 MHz for DBR lasers. This thesis investigates several methods to stabilize the beat note, then to modify the fiber birefringence, to increase the beat frequency. First, an optical phase-locked loop method is used to lock the beat note on a frequency reference. By using the pump diode as an actuator, we have successfully stabilized beat frequencies between 300 MHz and 10 GHz for days. We then study a stabilization method by frequency-shifted optical feedback. A theoretical model based on rate equations model is used and allows to retrieve the experimental observations. We observe different dynamical regimes by locking the beat note on a reference frequency. In the stable area, we reduce the phase noise to −100 dBc/Hz at 1 kHz from the carrier. Next, we have mixed the set-up of the injection-locking to a delay line, in order to effectively stabilize the beat note on itself. Finally, various approaches have been explored to increase the beat frequency of DBR lasers, to the needs of applications. It has been possible to continuously monitor the impact of a UV beam on the fiber birefringence. We also studied a method for reversible modification of the birefringence, exploiting the elasto-optical effect. Regardless of the method used, we observed an increase in the beat frequency from 100 MHz to more than 10 GHz in the best case
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Castaneda, Juan Carlos Hernandez. "Ytterbium fibre laser cutting of wood." Thesis, University of Manchester, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520761.

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This Ph.D. project provides for the first time the basic characteristics of fibre laser interaction with pine wood in dry and wet state. Fibre laser has gained importance in the laser material processing market as it presents an advanced technology. It is compact, reliable and more efficient than CO2 and Nd:YAG lasers. The high quality laser beam generated is currently in the kilowatt power level suitable for cutting operations. Furthermore, this laser system needs low maintenance and it has very long working life. It also presents the flexibility of fibre delivery, up to 200 meters from the laser source. Three major experiments were performed: laser cutting of dry pine wood with multiple passes of the laser beam; the laser cutting of wet and dry pine wood; analysing the effect of single and dual assisting gas jet(s) in the fibre laser cutting process. In each experiment, the main process parameters and their interactions affecting the process were discussed. Furthermore, the application of a desirability equation provided the optimal combination of the parameters involved (within the experimental window tested) to maximise the yield and the quality of the laser cutting operation. The effect of the assistant gas jet(s) was further analysed with a computational fluid dynamic (CFD) model, which information clarified its/their action in ejecting fumes and combusted materials in the process. Finally, an application study of Ytterbium fibre laser cutting of hardwood branches was performed; the results obtained were compared with CO2 laser cutting results reported in the literature.
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Carey, Christian. "Laser forming of fibre metal laminates." Thesis, University of Liverpool, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.511073.

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Hanna, Marc. "Sources laser femtoseconde à fibre optique." Habilitation à diriger des recherches, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00806296.

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Les sources laser à fibre sont de plus en plus utilisées dans des domaines très divers car elles possèdent des avantages majeurs : qualité de faisceau, intégration, possibilité d'émettre une puissance moyenne élevée, efficacité, robustesse. Nous présentons des travaux de recherche visant à étendre les performances des sources ultrarapides basées sur les fibres en utilisant des effets d'optique non linéaire et en proposant de nouvelles architectures laser.
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Mandal, Jharna. "Fibre laser development for sensor applications." Thesis, City University London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435942.

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Books on the topic "Fibre Laser"

1

Heikkinen, Veli. Tunable laser module for fibre optic communications. Espoo [Finland]: VTT Technical Research Centre of Finland, 2004.

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J, Adams M., and Institution of Electrical Engineers, eds. Semiconductor lasers for long-wavelength optical-fibre communications systems. London, U.K: P. Peregrinus on behalf of the Institution of Electrical Engineers, 1987.

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Nor, S. Z. Mohd. Laser induced damage in carbon fibre composites. Manchester: UMIST, 1996.

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Love, Adrian. Hollow Core Optical Fibre Based Gas Discharge Laser Systems. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-93970-4.

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Pierce, S. G. Development of fibre-optic interferometers for the measurement of laser-generated ultrasound. Manchester: UMIST, 1993.

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John, Joseph. Semiconductor laser diode to single-mode fibre coupling using discrete and micro-lenses. Birmingham: University of Birmingham, 1993.

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Zin, Khazali Haji Mohd. Ultrasonic wave propagation in carbon fibre reinforced plastic (CFRP) by non-contact laser. [s.l.]: typescript, 1998.

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Scudder, Lawrence Philip. Characterisation and testing of carbon fibre reinforced polymer composites using laser generated ultrasound. [s.l.]: typescript, 1994.

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Mulvihill, Paul. Manufacturing optical fibre Bragg grating strain sensors with an excimer laser for high-strain, multiplexed embedded applications. [Toronto]: University of Toronto institute for Aerospace Studies, 1997.

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Mulvihill, Paul. Manufacturing optical fibre Bragg grating strain sensors with an excimer laser for high-strain, multiplexed embedded applications. Ottawa: National Library of Canada = Bibliothèque nationale du Canada, 1999.

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Book chapters on the topic "Fibre Laser"

1

Ferguson, A. I., M. W. Phillips, D. C. Hanna, and A. C. Tropper. "Fibre Lasers." In Laser Spectroscopy VIII, 422–25. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-540-47973-4_135.

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Güther, R., M. Becker, R. Staske, and H. Richter. "Two-Dimensional Offset Microsensing by Fibre-Fibre Coupling." In Laser in der Technik / Laser in Engineering, 705–8. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-662-08251-5_153.

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Travers, J. C., and J. R. Taylor. "Fibre Based Supercontinuum." In The Supercontinuum Laser Source, 199–245. New York, NY: Springer New York, 2016. http://dx.doi.org/10.1007/978-1-4939-3326-6_5.

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Travers, J. C., and J. R. Taylor. "Fibre-Based Supercontinuum." In The Supercontinuum Laser Source, 237–98. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-06197-4_5.

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Réglat, M., I. Verrier, M. Ramos, J. P. Goure, P. Sass, G. Clauss, A. Kévorkian, and F. Rehouma. "Micro-Sensors and Fibre Optics." In Laser in der Technik / Laser in Engineering, 737–45. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-662-08251-5_160.

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Chakari, A., N. Mancier, L. F. Massoumu, and P. Meyrueis. "Polarimetric Sensor Using Multimode Optical Fibre." In Laser in der Technik / Laser in Engineering, 746–49. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-662-08251-5_161.

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Cranch, Geoffrey A., and Philip J. Nash. "Optical Fibre Hydrophones." In Handbook of Laser Technology and Applications, 81–109. 2nd ed. 2nd edition. | Boca Raton : CRC Press, 2021– |: CRC Press, 2021. http://dx.doi.org/10.1201/9781003130123-6.

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Donati, S., and G. Martini. "High-Sensitivity Fibre-Optic Spectrophotometer." In Laser/Optoelektronik in der Technik / Laser/Optoelectronics in Engineering, 760–65. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-48372-1_161.

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Communal, J. E. P. C., G. Largounez, A. B. Grudinin, M. In Het Panhuis, and W. J. Blau. "Hybrid Soliton Fibre Laser Characterisation." In Nonlinear Optics for the Information Society, 99–103. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-015-1267-1_19.

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Alcock, I. P., A. I. Ferguson, D. C. Hanna, A. C. Tropper, R. Mears, D. N. Payne, S. Poole, and L. Reekie. "Single-Mode Neodymium Fibre Laser." In Spectroscopy of Solid-State Laser-Type Materials, 577. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4613-0899-7_44.

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Conference papers on the topic "Fibre Laser"

1

Chen, L. L., Y. C. Ding, and R. X. Teng. "Random Fibre Laser." In IET International Conference on Information Science and Control Engineering 2012 (ICISCE 2012). Institution of Engineering and Technology, 2012. http://dx.doi.org/10.1049/cp.2012.2378.

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Zhu, Hongbo, Mingming Hao, Hangyu Peng, and Lijun Wang. "808nm Fibre Coupled Diode Laser Module for Fiber Lasers Pumping." In CIOMP-OSA Summer Session: Lasers and Their Applications. Washington, D.C.: OSA, 2011. http://dx.doi.org/10.1364/sumsession.2011.th40.

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Bowden, M. D., and S. L. Knowles. "A high-energy fibre-to-fibre connection for direct optical initiation systems." In SPIE Laser Damage, edited by Gregory J. Exarhos, Vitaly E. Gruzdev, Joseph A. Menapace, Detlev Ristau, and M. J. Soileau. SPIE, 2012. http://dx.doi.org/10.1117/12.978076.

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Meggitt, B. T., and A. W. Palmer. "Distance Measurement Using Laser Diodes." In Fibre Optics '89, edited by Peter McGeehin. SPIE, 1989. http://dx.doi.org/10.1117/12.961006.

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Li, Kang, Yishan Wang, Wei Zhao, Guofu Chen, Qinjun Peng, Dafu Cui, and Zuyan Xu. "High-power double-clad large-mode-area photonic crystal fibre laser." In ICO20:Lasers and Laser Technologies, edited by Y. C. Chen, Dianyuan Fan, Chunqing Gao, and Shouhuan Zhou. SPIE, 2006. http://dx.doi.org/10.1117/12.667148.

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Lancaster, David G., Shayne Bennetts, Alex Sabella, Peter Henry, and Stuart D. Jackson. "In-fibre resonant pumping of a fibre laser." In 2008 Joint Conference of the Opto-Electronics and Communications Conference (OECC) and the Australian Conference on Optical Fibre Technology (ACOFT). IEEE, 2008. http://dx.doi.org/10.1109/oeccacoft.2008.4610374.

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Myren, N. "All-fibre electro-optic tuning of fibre laser." In 31st European Conference on Optical Communications (ECOC 2005). IEE, 2005. http://dx.doi.org/10.1049/cp:20050370.

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Elder, Ian. "Thulium fibre laser pumped mid-IR laser." In SPIE Europe Security and Defence, edited by David H. Titterton and Mark A. Richardson. SPIE, 2008. http://dx.doi.org/10.1117/12.803643.

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Webb, D. J., J. D. C. Jones, and D. A. Jackson. "Laser Diode Frequency Stabilisation Techniques For Interferometric Sensors." In Fibre Optics '88, edited by Lionel R. Baker. SPIE, 1988. http://dx.doi.org/10.1117/12.947532.

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Duterte, C., J. B. Lecourt, A. Cserteg, Y. Hernandez, D. Giannone, P. E. Martin, A. Kupisiewicz, P. Gailly, J. Hastanin, and K. Fleury. "Ultra-short pulse fibre laser parameters optimisation for CdTe thin film solar cells processing and fibre laser design." In Fiber Laser Applications. Washington, D.C.: OSA, 2011. http://dx.doi.org/10.1364/filas.2011.fthc3.

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Reports on the topic "Fibre Laser"

1

Simpson, Thomas B. Fiber Laser Array. Fort Belvoir, VA: Defense Technical Information Center, January 2002. http://dx.doi.org/10.21236/ada403729.

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Clarkson, William A. Tm Doped Fiber Laser Pumped by a Cladding-Pumped Er, Yb Fiber Laser. Fort Belvoir, VA: Defense Technical Information Center, February 2006. http://dx.doi.org/10.21236/ada445906.

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Teegarden, Kenneth J. Fiber Laser Amplifiers and Oscillators. Fort Belvoir, VA: Defense Technical Information Center, September 1993. http://dx.doi.org/10.21236/ada274231.

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Radojevic, Antonije. Terahertz Fiber Laser for Explosives Detection. Fort Belvoir, VA: Defense Technical Information Center, June 2007. http://dx.doi.org/10.21236/ada468805.

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Ziegler, K. E. Fiber-Optic Laser Raman Spectroscopy Sensor. Office of Scientific and Technical Information (OSTI), September 2003. http://dx.doi.org/10.2172/815181.

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Morse, T. F. Advances in Fiber Lasers. Fort Belvoir, VA: Defense Technical Information Center, May 2002. http://dx.doi.org/10.21236/ada409019.

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Morse, T. F. Research in Fiber Lasers. Fort Belvoir, VA: Defense Technical Information Center, January 2002. http://dx.doi.org/10.21236/ada430983.

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Ballato, John, Martin Richardson, Michael Bass, and Bryce Samson. High Power Fiber Lasers. Fort Belvoir, VA: Defense Technical Information Center, August 2012. http://dx.doi.org/10.21236/ada570856.

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Weist, Todd E., Daniel S. Hinkel, and Kevin Whitcomb. Blue Emitting Fiber Lasers. Fort Belvoir, VA: Defense Technical Information Center, February 1998. http://dx.doi.org/10.21236/ada341571.

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Morse, T. F. Advances in Fiber Lasers. Fort Belvoir, VA: Defense Technical Information Center, November 1999. http://dx.doi.org/10.21236/ada380043.

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