Results 241 to 250 of about 13,277 (292)

Excitability in a semiconductor laser with saturable absorber

Optics Letters, 2011
We show that a monolithic and compact vertical cavity laser with intracavity saturable absorber can emit short excitable pulses. These calibrated optical pulses can be excited as a response to an input perturbation whose amplitude is above a certain threshold.
Sylvain, Barbay, Robert, Kuszelewicz, Alejandro M, Yacomotti   +2 more
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Inhomogeneously broadened laser with a saturable absorber

Physical Review A, 1987
A quantum theory for a laser with inhomogeneously broadened active and absorber atoms is presented. Photon-number distributions are derived for both on- and off-resonance operation of the laser, and the results are compared with the results of earlier investigations.
, Mortazavi, , Singh
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Tricritical behavior in the laser with a saturable absorber

Physical Review Letters, 1990
Nonequilibrium continuous and discontinuous phase transitions in the laser with a saturable absorber have been observed. A novel feature of these measurements is the observation of the tricritical behavior. The adequacy of the perturbative approach to describe saturation effects is discussed in light of these measurements.
, Mortazavi, , Singh
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An Analysis of Saturable Absorbers

Applied Optics, 1967
This paper contains an analysis of the behavior of saturable filters, based on models with simple energy level structures. In this analysis, the effects of possible excited state absorption at the irradiating wavelength are considered and are shown to give rise to a nonsaturable component of the absorption coefficient.
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Stochastic resonance in a laser with saturable absorber

Il Nuovo Cimento D, 1995
We have investigated, experimentally and theoretically, the occurrence of stochastic resonance (SR) in a laser with saturable absorber: a non-linear optical system presenting optical bistability and self-pulsed regimes for the laser output intensity. In the optical-bistability regime we have obtained an excellent demonstration of SR by studying Fourier
GUIDONI L, MANNELLA, RICCARDO, ISAIA V, VERKERK P, ARIMONDO, ENNIO   +4 more
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Structure of chaos in the laser with saturable absorber

Physical Review Letters, 1992
We carry out a topological analysis on an experimental data set from the laser with saturable absorber. This analysis is based on the topological organization of low period orbits extracted from chaotic time series data. This allows us to determine for the first time that previously proposed models are compatible with the ...
F. PAPOFF, A. FIORETTI, ARIMONDO, ENNIO, G. B. MIDLIN, H. SOLARI, R. GILMORE   +5 more
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Study of Saturable Absorber Switching Efficiencies

Journal of Applied Physics, 1969
Theoretical and experimental studies of absorber switching efficiencies are described for a ruby laser operating at 77°K. The various operating regimes of absorber-switched lasers are reviewed and the importance of inclusion in the theory of nonsaturable losses associated with the laser and absorber media is demonstrated.
Szabo, A., Erickson, L. E.
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Saturable absorber intensity modulator

IEEE Journal of Quantum Electronics, 2003
We propose and demonstrate a reflection-type optical modulator, with surface-normal architecture that exploits saturation of absorption in semiconductor quantum wells pumped optically. The modulation section, composed of quantum wells placed within a Fabry-Perot cavity, is exposed to an intensity-modulated beam generated by an in-plane laser integrated
M.D. Guina, A. Vainionpaa, L. Orsila, A. Harkonen, J. Lyytikainen, L.A. Gomes, O.G. Okhotnikov   +6 more
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Microscopic analysis of saturable absorbers: Semiconductor saturable absorber mirrors versus graphene

Journal of Applied Physics, 2016
Fully microscopic many-body calculations are used to study the influence of strong sub-picosecond pulses on the carrier distributions and corresponding optical response in saturable absorbers used for mode-locking—semiconductor (quantum well) saturable absorber mirrors (SESAMs) and single layer graphene based saturable absorber mirrors (GSAMs).
J. Hader, H.-J. Yang, M. Scheller, J. V. Moloney, S. W. Koch   +4 more
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Vertical-cavity saturable absorber intensity modulator

Journal of Lightwave Technology, 2003
We propose and demonstrate a reflection-type optical modulator, with surface-normal architecture, that exploits the optical saturation of absorption in semiconductor quantum wells. The modulation section of the modulator, which is composed of quantum wells placed within a Fabry-Perot cavity, is optically controlled by an intensity-modulated beam ...
M, Guina, A, Vainionpää, A, Harkonen, L, Orsila, J, Lyytikäinen, O G, Okhotnikov   +5 more
openaire   +2 more sources