Results 211 to 220 of about 1,473 (264)

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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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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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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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 ...
, Papoff, , Fioretti, , Arimondo, , Mindlin, , Solari, , Gilmore   +5 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
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Multiwave diffraction in saturable absorbers

Journal of the Optical Society of America B, 1995
We present an analytical description of the degenerate multiwave diffraction of an independent probe beam incident at an arbitrary angle upon a population grating created by two resonant and coherent pump beams in a saturable absorbing medium. We have also undertaken experimental verification of some of the features, using a thin-film sample of ...
K. Divakara Rao, K. K. Sharma
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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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WAVE INTERACTIONS IN SATURABLE ABSORBERS

Applied Physics Letters, 1967
The interaction between waves in an idealized saturable absorber is discussed. It is shown that the presence of a strong wave will cause the line to appear to be ``hole-burned'' when probed by a second wave, even though the broadening mechanisms are conventionally homogeneous.
S. E. Schwarz, T. Y. Tan
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Saturation-Induced Perfect Absorbers

Conference on Lasers and Electro-Optics, 2018
We introduce a new regime of optical absorption where increasing the incoming intensity - equivalently inducing optical saturation - leads to the enhancement of total absorption in a device, and always reaches 100% at a critical value.
Jahromi, Ali K., Abouraddy, Ayman F.
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