Results 241 to 250 of about 2,049 (291)
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The generalized saturable absorber
IEEE Photonic Society 24th Annual Meeting, 2011We extend the concept of the saturable absorber made of two linear polarizers and a fiber section to a structure with multiple polarizers and fibers. The structure is studied with simple analytical relations and full numerical simulations. We stablish design procedures for fiber lasers.
Rafael Gomez Alcala, Antonio Dengra
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Scaling of the antiresonant Fabry–Perot saturable absorber design toward a thin saturable absorber
Optics Letters, 1995We demonstrate and discuss the scaling of the antiresonant Fabry-Perot saturable absorber toward a novel antiref lection-coated thin saturable absorber. With a Ti:sapphire laser we obtained self-starting Kerr-lens mode-locked pulses as short as 19 fs. With the higher modulation depth of the thin saturable absorber we obtained soliton mode-locked self ...
I D, Jung +4 more
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Lifetimes of Saturable Absorbers
Nature, 1966THE use of saturable absorbers such as aluminium phthalocyanine for the passive Q-switching of ruby lasers1 raises the question of the lifetime of the active molecule. We have measured the lifetime of that state of aluminium phthalocyanine which corresponds to absorption at or near 6943 A.
P. W. A. BOWE +2 more
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Broadband fast semiconductor saturable absorber
Optics Letters, 1992Kerr lens mode-locked (KLM) solid-state lasers are typically not self-starting. We address this problem by introducing a broadband semiconductor saturable absorber that could be used as a tunable, all-solid-state, passive starting mechanism. We extend the wavelength tunability of a semiconductor saturable absorber to more than 100 nm using a band-gap ...
G R, Jacobovitz-Veselka +2 more
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Inhomogeneously broadened laser with a saturable absorber
Physical Review A, 1987A 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, 1990Nonequilibrium 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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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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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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