Results 311 to 320 of about 240,134 (346)

Passive mode locking with a hybrid laser

Summaries of Papers Presented at the Lasers and Electro-Optics. CLEO '02. Technical Diges, 2003
It has been shown that a hybrid laser, which contains both an inhomogeneously broadened and a homogeneously broadened laser media, can improve the active mode locking performance.1,2 It generates coherent and shorter pulses as compared to that by either the inhomogeneously broadened medium or the homogenously broadened medium alone.
Han, Song, Yan, Li, Menyuk, Curtis
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Mode-locked fiber laser gyroscope

Optics Letters, 1993
We describe a new form of an all-fiber-optic gyroscope that utilizes a fiber laser. The Sagnac interferometer is used as a loop reflector with a modulated reflectivity to produce actively mode-locked optical pulses. The rotation-induced phase shift is obtained from the timing shift of the pulses.
JEON, MY, JEONG, HJ, KIM, BY Kim, Byoung Yoon   +2 more
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Mode-Locking Techniques of Femtosecond Laser

2020 The 9th International Conference on Networks, Communication and Computing, 2020
Ultrafast laser is a well-developed technology with its origin dated back to half a century ago, and femtosecond laser, being the type of ultrafast laser with the lowest duration, appeared in a much later stage. The essential technique which made femtosecond laser possible is mode-locking.
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Self-mode-locked Cr:forsterite laser

Optics Letters, 1993
We have demonstrated self-sustaining operation of a mode-locked chromium-doped forsterite laser in which short-pulse formation is entirely due to the nonlinearity of the laser crystal. Stable pulse trains are generated for intracavity pulse energies from 35 to 120 nJ. Pulses less than 100 fs in duration are obtained over the range of 1.23–1.28 μm, with
Y, Pang, V, Yanovsky, F, Wise, B I, Minkov   +3 more
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Mode locking of a wavelength-swept laser

Optics Letters, 2005
Self-starting, stable mode-locked pulses can be generated from a wavelength-swept laser through the interplay between an intracavity scanning filter and self-phase modulation. From an Er3+-doped fiber laser employing a scanning Fabry-Perot filter, 100 ps optical pulses are obtained at a 12-MHz repetition rate with center wavelengths that are swept over
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Mode-locked ytterbium fiber lasers

Applied Optics, 2004
A compact fiber laser is demonstrated with use of a Gires-Tournois compensator and a short length (2-4 cm-long) of highly doped ytterbium (Yb) fiber providing net anomalous group-velocity dispersion. With use of a novel semiconductor saturable absorber mirror based on GaInNAs structure, self-started 1.5-ps-pulse mode-locked operation was obtained at ...
Lasse, Orsila, Luís A, Gomes, Ning, Xiang, Tomi, Jouhti, Oleg G, Okhotnikov   +4 more
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Passive mode locking of the Ar^+ laser

Applied Optics, 1988
We have studied passive mode locking of the Ar(+) laser using the saturable absorber rhodamine 6G in four different regimes as follows: when the Ar(+) laser operates in the colliding pulse mode locking configuration (1) with and (2) without double mode locking incorporated and also when the Ar(+) laser operates in the conventional configuration (3 ...
Y L, Wang, E, Bourkoff
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The graphene mode-locked fiber laser

SPIE Proceedings, 2011
Starting from the structure of graphene, the electrical and optical properties of graphene is analyzed in this paper. Then, the transmission characteristics and the modulation for the optical pulses are discussed with the graphene waveguide model. Finally, the graphene based on the mode-locked fiber laser system is simulated, thereafter the role played
Guo Shili, Yang Aiying, Sun Yvnan
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Pulse Dynamics in an Actively Mode-Locked Laser

SIAM Journal on Applied Dynamical Systems, 2003
Summary: We consider pulse formation dynamics in an actively mode-locked laser. We show that an amplitude-modulated laser is subject to large transient growth and we demonstrate that at threshold the transient growth is precisely the Petermann excess noise factor for a laser governed by a nonnormal operator.
John B. Geddes, Willie J. Firth, Kelly J. Black   +2 more
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Theory of mode-locked semiconductor lasers

IEEE Journal of Quantum Electronics, 1996
We present a theoretical study of semiconductor mode-locked lasers at a phenomenological level. We use the slow absorber model of New and Haus, but extend the analysis by taking into account the shift in the gain maximum due to the changing number of carriers.
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