Results 211 to 220 of about 1,463 (263)
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Single-mode-fiber saturable absorber
Optics Letters, 1984Saturable absorption is performed on a signal in a single-mode fiber by allowing the evanescent field of the guided wave to interact with a saturable-absorbing dye. The evanescent field is exposed by mechanically removing a portion of the fiber cladding. The saturable material is then placed in close proximity to the fiber core.
W V, Sorin +3 more
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Excitability in a semiconductor laser with saturable absorber
Optics Letters, 2011We 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 +2 more
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An Analysis of Saturable Absorbers
Applied Optics, 1967This 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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Rubrene, a saturable absorber for 308 nm
Optics Communications, 1988Abstract The use of the 1 A- 1 B b transition in catacondensed polycyclic aromatic hydrocarbons for the saturable absorption by excimer laser pulses is suggested. The saturation characteristics of rubrene (in benzene solution) for sub-ps XeCl ∗ laser pulses are reported. Numerical calculations which include excited state absorption are presented.
Kaschke, M., Ernsting, N., Schäfer, F.
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Stochastic resonance in a laser with saturable absorber
Il Nuovo Cimento D, 1995We 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 +4 more
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Structure of chaos in the laser with saturable absorber
Physical Review Letters, 1992We 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 +5 more
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Study of Saturable Absorber Switching Efficiencies
Journal of Applied Physics, 1969Theoretical 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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Vertical-cavity saturable absorber intensity modulator
Journal of Lightwave Technology, 2003We 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 +5 more
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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 +4 more
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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 +4 more
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Saturation-Induced Perfect Absorbers
Conference on Lasers and Electro-Optics, 2018We 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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