Relevant bibliographies by topics / Optical pumping

Academic literature on the topic 'Optical pumping'

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Published: 4 June 2021
Last updated: 27 July 2024

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Journal articles on the topic "Optical pumping"

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NOH, Heung-Ryoul. "Optical Pumping Spectroscopy." Physics and High Technology 19, no. 5 (May 31, 2010): 7. http://dx.doi.org/10.3938/phit.19.022.

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Baghban, H., R. Maram Q, R. Oliaee, R. Yadipour, and A. Rostami. "Quantum dot semiconductor optical amplifiers: optical pumping versus electrical pumping." Journal of Optics 13, no. 3 (February 10, 2011): 035406. http://dx.doi.org/10.1088/2040-8978/13/3/035406.

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Wang, Yanhua, Zhihua Kang, Li Yang, Qiang Ma, Yu Wang, Yabin Dong, and Junmin Wang. "Time response of spin-polarized rubidium thermal gas with radio-frequency pulse driving." Journal of Applied Physics 131, no. 13 (April 7, 2022): 134402. http://dx.doi.org/10.1063/5.0082535.

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The time evolution of the polarization of a rubidium atom spin ensemble driven by a resonant radio-frequency (RF) magnetic field is analyzed based on the rate equation. A simple optical pumping experimental system is constructed and the time response of the rubidium atomic ensemble is demonstrated by recording the transmitted intensity of pumping light. In the steady-state response, the polarization difference between the optical pumping steady state and the magnetic resonance steady state depends on the optical pumping power and RF magnetic intensity. We can obtain the optimal power value corresponding to the maximum polarization difference. In terms of transient response, where the intensity of RF magnetic field is too weak to observe Rabi oscillations, two decay processes between magnetic resonance and optical pumping steady states are monitored. The decay time from magnetic resonance steady state to optical pumping steady state depends on the optical pumping rate and the spin relaxation rate. The decay time from optical pumping steady state to magnetic resonance steady state depends on the optical pumping rate, the RF driving rate, and the spin relaxation rate. The scale factor of pumping rate to pumping power is obtained, in addition to that of RF driving rate to the RF magnetic field. It can provide an intuitive understanding of the spin dynamic evolution of the polarized atomic ensemble.
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Klimcak, C. M., J. C. Camparo, R. A. Cook, and R. P. Frueholz. "Subnatural optical pumping dips." Physical Review A 34, no. 2 (August 1, 1986): 1575–77. http://dx.doi.org/10.1103/physreva.34.1575.

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Happer, W., and W. A. Van Wijngaarden. "An optical pumping primer." Hyperfine Interactions 38, no. 1-4 (December 1987): 435–70. http://dx.doi.org/10.1007/bf02394855.

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Hermann, C., G. Lampel, and V. I. Safarov. "Optical pumping in semiconductors." Annales de Physique 10, no. 6 (1985): 1117–38. http://dx.doi.org/10.1051/anphys:019850010060111700.

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Elsts, E., A. Supe, S. Spolitis, K. Zakis, S. Olonkins, A. Udalcovs, R. Murnieks, et al. "Fibre Optical Coupler Simulation by Comsol Multiphysics Software." Latvian Journal of Physics and Technical Sciences 59, no. 5 (October 1, 2022): 3–14. http://dx.doi.org/10.2478/lpts-2022-0036.

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Abstract The paper presents a simulation model developed for a special optical coupler intended for coupling radiation from signal and pump sources used for the realization of cladding-pumped doped fibre amplifiers. The model is developed in COMSOL Multiphysics and used to assess the pumping efficiency for different side pumping angles and different numbers of electromagnetic modes. The obtained results show that the highest pumping efficiency, above 75 %, is achieved for 5–14 modes when two fibres representing the pump source and the signal source form a 10-degree angle between their central axes. The search for the optimal number of modes corresponds to the development trend in optical coupler technology where the multimode pumping by light-emitting diode (LED) replaces the classical scheme with a single-mode pumping by a laser diode (LD).
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Nahaei, Farshad Serat, Ali Rostami, and Peyman Mirtaheri. "Quantum Dot Reflective Semiconductor Optical Amplifiers: Optical Pumping Compared with Electrical Pumping." Nanomaterials 12, no. 13 (June 22, 2022): 2143. http://dx.doi.org/10.3390/nano12132143.

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A comprehensive study has been conducted on quantum dot reflective semiconductor optical amplifiers (QD-RSOAs) with optical pumps (OPs). Moreover, few studies have been completed on OP-based QD-RSOAs. A comparison is made between them and QD-RSOAs with electrical pumps (EPs) in this study. It is shown that the dynamical properties of the device can significantly develop in the optical pumping version. The optical properties are studied for both methods. Moreover, by solving the coupled differential rate and signal propagation equations, the operation of the device in the pulse mode is investigated. Finally, it is proven that OP QD-RSOAs can perform significantly better in applications such as fast all-optical signal processing and wavelength division multiplexing in passive optical networks.
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Hamel, Joseph, Amine Cassimi, Hassan Abu-Safia, Michele Leduc, and L. D. Schearer. "Diode pumping of LNA lasers for helium optical pumping." Optics Communications 63, no. 2 (July 1987): 114–17. http://dx.doi.org/10.1016/0030-4018(87)90270-7.

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Stefanatos, Dionisis, and Emmanuel Paspalakis. "On the optimality of optical pumping for a closed Λ-system with large decay rates of the intermediate excited state." Journal of Physics A: Mathematical and Theoretical 55, no. 4 (January 5, 2022): 045302. http://dx.doi.org/10.1088/1751-8121/ac43cb.

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Abstract We use optimal control theory to show that for a closed Λ-system where the excited intermediate level decays to the lower levels with a common large rate, the optimal scheme for population transfer between the lower levels is actually optical pumping. In order to obtain this result we exploit the large decay rate to eliminate adiabatically the weakly coupled excited state, then perform a transformation to the basis comprised of the dark and bright states, and finally apply optimal control to this transformed system. Subsequently, we confirm the optimality of the optical pumping scheme for the original closed Λ-system using numerical optimal control. We also demonstrate numerically that optical pumping remains optimal when the decay rate to the target state is larger than that to the initial state or the two rates are not very different from each other. The present work is expected to find application in various tasks of quantum information processing, where such systems are encountered.
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Dissertations / Theses on the topic "Optical pumping"

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Favorskiy, Igor. "Optical pumping in Silicon thin films." Phd thesis, Ecole Polytechnique X, 2013. http://pastel.archives-ouvertes.fr/pastel-00950979.

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Grâce à un long temps de vie de spin, le silicium est un matériau prometteur pour l'électronique de spin. Mais les approches classiques d'étude de la dynamique de spin basées sur la luminescence polarisée ne peuvent pas être utilisées dans ce matériau à cause du faible couplage spin-orbite et du gap indirect. Dans ce travail, nous avons étudié la polarisation de spin des électrons de conduction créée en condition de pompage optique par spectroscopie de photoémission. La surface du silicium est activée en affinité négative par dépôt de césium et d'oxygène de sorte que les électrons photoexcités avec une énergie proche du gap peuvent émis dans le vide. Nous utilisons un laser accordable qui permet de mesurer systématiquement le spectre de polarisation pour des énergies d'excitation allant du seuil d'absorption jusqu'à la bande Gamma2- au-dessus du gap direct. Nous avons obtenus les spectres de polarisation à partir de couches minces SOI d'épaisseurs différentes. A partir de ces résultats, nous déterminons la valeur de paramètres importants de la structure de bande comme le gap direct ou l'énergie du couplage spin-orbite. Cependant, contrairement aux prédictions, lorsque l'épaisseur de la couche de silicium diminue jusqu'à des valeurs inférieures à la longueur de diffusion de spin, la polarisation en spin des électrons émis reste proche de zéro (-0.4%), remettant en cause l'interprétation directe des valeurs théoriques de la polarisation initiale égale à -20%. Une approche théorique a donc été développée sur la base d'un modèle ab initio de structure de bande pour déterminer les spectres de polarisation en spin. Ces calculs sont encore en cours, mais les résultats déjà obtenus sur la structure électronique du silicium sous contrainte indiquent une piste intéressante pour les études futures.
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Taylor, Jason Matthew 1977. "Shaped ultrafast optical pumping for NMR applications." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/88353.

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Thesis (S.M.)--Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2002.
Includes bibliographical references (leaves 104-108).
by Jason Matthew Taylor.
S.M.
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Johnston, Colin I. "Optical and electrical pumping of colour-centre media." Thesis, University of St Andrews, 1991. http://hdl.handle.net/10023/13756.

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Within this thesis the exploitation of the large homogeneously broadened bandwidth of the LiF:F+2 colour-centre laser by production of frequency tunable ultrashort optical pulses over the 0.8-1.0mum spectral region has been presented. A synchronously pumped LiF:F+2 colour-centre laser produced pulses of 700fs duration with average powers of 30mW when a colliding-pulse-modelocked travelling-wave cavity was implemented. Passive modelocking of the LiF:F+2 colour-centre laser was achieved over two spectral operating regions centred around 860nm and 930nm when the saturable absorber dyes IR140 and DaQTeC were employed. Pulse durations as short as 180fs and 130fs were obtained at 860nm and 930nm respectively using colliding-pulse-modelocked group-velocity-dispersion compensated resonators. The laser was pumped at a 10% duty cycle throughout. The use of coupled-cavity- modelocking techniques combined with passive modelocking was found to extend both the tuning range of the laser and useful operating lifetime of the saturable dye. A home built NaCl:OH- colour-centre laser which encorporates the stabilised F+2 colour- centre is presented. Output powers of up to 450mW were obtained for input pump powers of 4W and the laser tuned from 1.4-1.8?m. Electroluminescence studies of NaCl, CsI, CsI:Na, CsI:Tl, and KI crystals are also presented in a study to assess the feasibility of obtaining laser action from such materials by electrical excitation. KI is shown to be the favoured laser candidate by this excitation method and evidence of temporal narrowing and signal enhancement of the electroluminescence output is presented.
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Kumar, Yogesh. "Studies on optical pumping of semiconductor optical amplifier for fast gain recovery." Thesis, IIT Delhi, 2016. http://localhost:8080/iit/handle/2074/7067.

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Swoger, James Harvey. "On non-uniform pumping effects in semiconductor lasers." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ30171.pdf.

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Tabor, David. "Toward Rotational Cooling of Trapped SiO+ by Optical Pumping." Thesis, Northwestern University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3627205.

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This thesis presents a scheme for preparation of trapped molecular ions with a high degree of internal state purity by optical pumping with a broadband pulse-shaped femtosecond laser; the internal structure of SiO+ permits fast stepwise pumping through the tens of rotational levels populated in a room-temperature distribution. Two analyses, which guided the experimental implementation, are presented: (1) a novel method of quantifying anharmonicity in the trapping potentials, which limits the number of ions that can be trapped, and (2) a rate-equation simulation of the quantum state evolution during pumping. Experimental implementation of pulse shaping and its characterization are discussed, as is the molecular spectroscopy used to reference this light to the rotational cooling transitions. Internal state analysis can be performed using resonance enhanced multiphoton dissociation.

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Ferguson, A. H. "Far infrared optical pumping and laser magnetic resonance spectroscopy." Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382213.

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Norquay, Graham. "Spin-exchange optical pumping and nuclear magnetic resonance of 129Xe." Thesis, University of Sheffield, 2014. http://etheses.whiterose.ac.uk/12940/.

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The nuclear spin polarisation of 129Xe can be increased by four to five orders of magnitude using the technique spin-exchange optical pumping. The resulting enhancement in polarisation can be utilised to dramatically enhance the sensitivity of 129Xe in nuclear magnetic resonance (NMR) applications. This thesis is concerned with the physics of spin-exchange optical pumping and NMR spectroscopy of hyperpolarised 129Xe. Its general aims are to optimise the production of hyperpolarised 129Xe and to evaluate the underlying NMR mechanisms of 129Xe in blood (in vitro and in vivo). Chapters 3 and 4 detail experiments and modelling on a spin-exchange optical pumping polariser with the aim to optimise the production of hyperpolarised 129Xe for nuclear magnetic resonance NMR spectroscopy. This optimisation has enabled high-quality imaging of the airspaces of the human lungs as well as spectroscopy of 129Xe dissolved in blood and lung tissue. In addition to 129Xe polarisation optimisation, in Chapter 5, NMR experiments on 129Xe in human blood were performed to determine constants underpinning 129Xe NMR relaxation and exchange dynamics in whole blood samples. These constants should enable accurate modelling of 129Xe signal dynamics during in vivo experiments involving xenon transport from the lungs to distal tissues. Lastly, in Chapter 6, hyperpolarised 129Xe NMR was used to probe pulmonary blood oxygenation in vivo. A non-linear relationship between the 129Xe chemical shift in red blood cells was determined in vitro on human blood samples at 1.5 T and 3 T. This relationship was used for dynamic measurements of pulmonary blood oxygenation in a healthy volunteer during breath-hold apnoea on a 3 T scanner.
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Flinn, Gregory Patrick. "Laser spectroscopy of semiconductor quantum wells : optical pumping and optically detected nuclear magnetic resonance." Thesis, University of Southampton, 1991. https://eprints.soton.ac.uk/399448/.

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This thesis describes the experimental results of optical pumping studies made in some Type 1 GaAs/Al0.3Ga0.7As single quantum wells (QWs), ranging in widths from 50 to 200A. Optical pumping uses circularly polarised light to photocreate spin orientated carriers in the QWs. The polarised carriers, principally the electrons, transfer angular momentum to the nuclear spins of the lattice through the Fermi contact hyperfine interaction. The orientated nuclei act back on the electrons through the same interaction. Studies of the nuclear and carrier spin systems may be effected by monitoring the circular polarisation of the recombination luminescence. The Hanle Effect of the electron orientation within the QWs is measured as a function of well width, and of the non-photoexcited hole concentration. Correlation of this data with carrier recombination time measurements produces the magnitude of the carrier Landé factor. Allowing the nuclear field to influence the Hanle curves determines the sign of these g - factors, whence the free conduction electron value is observed to change sign at 55A and become positive for thinner wells. This result is compared to the bulk g -values of GaAs (-0.44) and Al0.3Ga0.7As (+0.40), and modelled using k . p theory to estimate the contributions to g* from the well and barrier materials. Nuclear orientation within the wells is observed by the optical detection of nuclear magnetic resonance (ODNMR), via the application of a radio frequency field (RF) to the orientated nuclear spins. ODNMR of ~ 1011 nuclear spins is measured in almost all the single QWs. The signals are studied as a function of various experimental influences, such as well width, p-type carrier concentration, RF magnitude, optical pumping time, and RF sweep rate. Observation is made of extrinsic lattice strain and spin diffusion of the nuclear magnetization, and results suggest increased nuclear relaxation rates within the barrier. n-type wells show no ODNMR, indicating that incomplete hole relaxation is present within the wells. The very wide and undisplaced Hanle curves observed in this type of well support this view. Nuclear orientation is not observed in some GaAs/InxGa1-xAs QW systems. This null result is discussed in terms of the experimental factors important for its successful observation in the GaAs/Al0.3Ga0.7As systems.
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Heitmann, Filip August. "Zinc Oxide Nanolaser : Photoluminescence spectroscopy and optical pumping of zinc oxide nanowires." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elektronikk og telekommunikasjon, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-16785.

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This Master's thesis is a continuation of the specialization project I did during the spring of 2011. The goal of said project was to set up a system for UV-photoluminescence experiments in the Nanophotonics laboratory at the Department of Electronics and Telecommunications at NTNU, and conduct photoluminescence spectroscopy measurements on different zinc oxide nanostructures, including GaAs/AlGaAs/ZnO core/multishell nanowires. This thesis involves studying zinc oxide nanowires using both a continuous wave and pulsed ultraviolet laser light, and the final goal is to optically excite these nanowires so they achieve lasing. Using a Tsunami Ti:sapph mode-locked tunable laser and a flexible harmonic generator, laser pulses with a pulse duration of 2 ps could be generated at wavelengths around 300 nm, at a power of around 5 mW. At this power, some of the wires showed possible signs of optical gain, but since it was not possible to apply more power to the wires, this could not be confirmed. If there had be enough time, both low temperature measurements and time-resolved spectroscopy, using a streak camera, would have been performed.
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Books on the topic "Optical pumping"

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Happer, William. Optically pumped atoms: Alkali-metal vapors for application. Weinheim: Wiley-VCH, 2010.

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Basov, I͡U G. Istochniki nakachki mikrosekundnykh lazerov. Moskva: Ėnergoatomizdat, 1990.

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Series, G. W. Laser spectroscopy and other topics: Selected papers of G.W. Series, Raman professor, 1982-83. Bangalore: Indian Academy of Sciences, 1985.

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Kvasil, Bohumil. Buzení otevřeného rezonátoru superrelativistickými elektrony. Praha: Academia, nakl. Československé akademie věd, 1985.

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Shank, C. V. Spectroscopy of nonequilibrium electrons and phonons. Amsterdam: North-Holland, 1992.

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Felix, Schuda, American Association of Physicists in Medicine., and Society of Photo-optical Instrumentation Engineers., eds. Flashlamp pumped laser technology: 21-22 January 1986, Los Angeles, California. Bellingham, Wash., USA: SPIE--the International Society for Optical Engineering, 1986.

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F, Albrecht Georg, Beach Raymond J, Velsko Stephan Paul 1955-, and Society of Photo-optical Instrumentation Engineers., eds. Diode pumping of average-power solid state lasers: 21-22 January 1993, Los Angeles, California. Bellingham, Wash., USA: SPIE, 1993.

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Peuser, Peter. Diodengepumpte Festkörperlaser. Berlin: Springer-Verlag, 1995.

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Brossel, Jean. Optical methods in atomic physics: Historical perspectives and a few new trends. Mainz: Akademie der Wissenschaften und der Literatur, 1992.

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The physics of laser-atom interactions. Cambridge: Cambridge University Press, 1997.

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Book chapters on the topic "Optical pumping"

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Schieck, Hans Paetz gen. "Polarization by Optical Pumping." In Nuclear Physics with Polarized Particles, 131–35. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-24226-7_9.

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Melnikov, S. P., A. N. Sizov, A. A. Sinyanskii, and George H. Miley. "Optical Inhomogeneities in Sealed NPLs." In Lasers with Nuclear Pumping, 247–94. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-08882-2_8.

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Pritchard, D. E., K. Helmerson, V. S. Bagnato, G. P. Lafyatis, and A. G. Martin. "Optical Pumping in Translation Space." In Laser Spectroscopy VIII, 68–72. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-540-47973-4_17.

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Gaj, J. A. "Optical Pumping in Cd1-xMnxTe." In Proceedings of the 17th International Conference on the Physics of Semiconductors, 1423–26. New York, NY: Springer New York, 1985. http://dx.doi.org/10.1007/978-1-4615-7682-2_323.

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Dianov, E. M., I. A. Bufetov, V. I. Karpov, M. M. Bubnov, A. N. Gurjanov, and V. F. Khopin. "Highly Efficient Phosphosilicate Raman Fiber Lasers for Optical Amplifiers Pumping." In Optical Networking, 165–76. London: Springer London, 1999. http://dx.doi.org/10.1007/978-1-4471-0525-1_18.

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Rausch, E., W. H. Kegel, and T. Tsuji. "Optical pumping of circumstellar SiO masers." In Lecture Notes in Physics, 251. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/bfb0102148.

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Mitko, S. V., F. A. Goor, W. J. Witteman, and V. N. Ochkin. "Optical Pumping and Ferrite Flash Discharges." In Gas Lasers - Recent Developments and Future Prospects, 185–204. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0235-0_14.

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Demtröder, Wolfgang. "Optical Pumping and Double-Resonance Techniques." In Laser Spectroscopy, 552–93. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-662-08260-7_10.

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Demtröder, Wolfgang. "Optical Pumping and Double-Resonance Techniques." In Advanced Texts in Physics, 567–607. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-05155-9_10.

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Demtröder, Wolfgang. "Optical Pumping and Double-Resonance Techniques." In Laser Spectroscopy 2, 225–69. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44641-6_5.

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Conference papers on the topic "Optical pumping"

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Heil, W. "Optical pumping of Helium-3." In Polarized ion sources and polarized gas targets. AIP, 1993. http://dx.doi.org/10.1063/1.45133.

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Lamsal, H. P., J. D. Franson, and T. B. Pittman. "Optical Pumping in Xenon Atoms." In Frontiers in Optics. Washington, D.C.: OSA, 2020. http://dx.doi.org/10.1364/fio.2020.ftu8c.7.

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Pack, Michael V., Paul A. Miller, and Jason Shelton. "Dynamics of flashlamp pumping a Nd:Cr:GSGG laser." In Optical Engineering + Applications, edited by Fred M. Dickey and Richard A. Beyer. SPIE, 2008. http://dx.doi.org/10.1117/12.795195.

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Khoury, Jed, Bahareh Haji-saeed, Charles Woods, and John Kierstead. "Grating THz laser with optical pumping." In SPIE Defense, Security, and Sensing, edited by Mehdi Anwar, Nibir K. Dhar, and Thomas W. Crowe. SPIE, 2010. http://dx.doi.org/10.1117/12.849445.

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Hatakeyama, A., Y. Hirayama, J. A. Behr, H. Izumi, C. D. P. Levy, D. Melconian, and T. Shimoda. "OPTICAL PUMPING AT THE ISAC POLARIZER." In Proceedings of the Ninth International Workshop. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812777683_0053.

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Hendriks, Rob F. M., Martin P. Van Exter, and J. P. Woerdman. "Optical versus electrical pumping in VCSELs." In Optoelectronics and High-Power Lasers & Applications, edited by Kent D. Choquette and Robert A. Morgan. SPIE, 1998. http://dx.doi.org/10.1117/12.305457.

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Wu, Xizeng. "Optical pumping and hyperpolarized spin relaxation." In Third International Conference on Photonics and Imaging in Biology and Medicine, edited by Qingming Luo, Valery V. Tuchin, Min Gu, and Lihong V. Wang. SPIE, 2003. http://dx.doi.org/10.1117/12.546114.

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Shmelev, V. M., and A. D. Margolin. "Resonance optical pumping of carbon monoxide." In The European Conference on Lasers and Electro-Optics. Washington, D.C.: Optica Publishing Group, 1994. http://dx.doi.org/10.1364/cleo_europe.1994.ctuk87.

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This work concerns the process of optical pumping of carbon monoxide using the resonance radiation of electroionization CO-laser affecting the high-lying vibrational levels (v = 4 … 12, where v is the number of a vibrational level).
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Bolshtyansky, Maxim, Nicholas King, and Gregory Cowle. "Characterization of Site Dependent Pumping in EDFA." In Optical Amplifiers and Their Applications. Washington, D.C.: OSA, 2005. http://dx.doi.org/10.1364/oaa.2005.wb5.

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Tremblay, F., A. Michaud, J. Beaubien, and É. Cauchon. "Optical pumping of an atomic vapor with a frequency-modulated laser." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1990. http://dx.doi.org/10.1364/oam.1990.wh3.

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Rubidium maser and passive frequency standards performances rely on the efficiency of the optical pumping scheme. When using a semiconductor laser as the pumping source in such experiments, one found that the sharpness of the laser spectrum allows only the excitation of a small class of atomic velocities. The use of a frequency-modulated laser has shown great promise by largely increasing the overall pumping efficiency.1 Broadening of the narrow laser spectrum ensures the contribution of all classes of atomic velocities present in the vapor.2 Different modulation waveforms, amplitudes and frequencies have very important effects in overall optical pumping efficiency. We theoretically evaluate the efficiency of a frequency-modulated laser pumping source by studying deterministic as well as random modulation. Important considerations are obtained regarding the optimal conditions concerning the magnitude and the bandwidth of the modulation signal. Moreover a deterministic modulation must be used to lock the laser frequency by interrogating an atomic cell and synchronously detecting the transmitted intensity. Experiments conducted on a rubidium 87 maser optically pumped with a semiconductor laser confirm the predictions. In fact the oscillation of the maser was only possible with the help of the laser frequency modulation.
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Reports on the topic "Optical pumping"

1

Raftery, M. Daniel. Optical pumping and xenon NMR. Office of Scientific and Technical Information (OSTI), November 1991. http://dx.doi.org/10.2172/10138720.

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2

Raftery, M. D. Optical pumping and xenon NMR. Office of Scientific and Technical Information (OSTI), November 1991. http://dx.doi.org/10.2172/6653527.

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3

Stevens, C. G., and F. Magnotta. Remote chemical sensing by laser optical pumping. Office of Scientific and Technical Information (OSTI), August 1996. http://dx.doi.org/10.2172/562910.

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4

Lin, Jingyu, and Hongxing Jiang. Erbium Doped GaN Lasers by Optical Pumping. Fort Belvoir, VA: Defense Technical Information Center, June 2016. http://dx.doi.org/10.21236/ad1017406.

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5

Hogle, Craig, Megan Ivory, Daniel Lobser, Brandon Ruzic, and Christopher DeRose. Three-Photon Optical Pumping for Trapped Ion Quantum Computing. Office of Scientific and Technical Information (OSTI), September 2021. http://dx.doi.org/10.2172/1854752.

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6

Jenssen, H. Equipment for Diode Laser Pumping of New and Improved Optical Materials. Fort Belvoir, VA: Defense Technical Information Center, May 1999. http://dx.doi.org/10.21236/ada380041.

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7

Zusin, Dmitriy, Ezio Iacocca, Loic Le Guyader, Alexander Reid, William Schlotter, Tian-Min Liu, Daniel Higley, et al. Ultrafast domain dilation induced by optical pumping in ferromagnetic CoFe/Ni multilayers. Office of Scientific and Technical Information (OSTI), February 2020. http://dx.doi.org/10.2172/1969372.

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8

Xuan Sun, Earl Scime, Mahmood Miah, Samuel Cohen, and Frederick Skiff. Measurement of Asymmetric Optical Pumping of Ions Accelerating in a Magnetic-field Gradient. Office of Scientific and Technical Information (OSTI), October 2004. http://dx.doi.org/10.2172/836151.

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9

Zorabedian, P. Optical Pumping And Photoluminescence Detection Of Spin-Polarized Electrons In Uniaxially Stressed Gallium Arsenide. Office of Scientific and Technical Information (OSTI), June 2018. http://dx.doi.org/10.2172/1453982.

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10

Muth, John. Integrated Optical Pumping of Cr & Ti-Doped Sapphire Substrates With III-V Nitride Materials. Fort Belvoir, VA: Defense Technical Information Center, August 2005. http://dx.doi.org/10.21236/ada523728.

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