Results 251 to 260 of about 13,087 (290)

High-order optical nonlinearities in saturable absorbers

Optics Letters, 1986
We present an experimental and theoretical study of self-diffraction in saturable absorbers, concentrating on the case of high-intensity beams interfering within the medium. We have observed fourth-order coherent scattering in DODCI. In our theory, which is not perturbative and is in quantitative agreement with the experiment, high-order scattering ...
H L, Fragnito, S F, Pereira, A, Kiel
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Rubrene, a saturable absorber for 308 nm

Optics Communications, 1988
Abstract 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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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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Femtosecond Yb:YAG laser using semiconductor saturable absorbers

Optics Letters, 1995
We demonstrate a passively mode-locked femtosecond Yb:YAG laser using different semiconductor saturable absorber devices, a high-finesse and a low-finesse antiresonant Fabry–Perot saturable absorber. We achieved pulses as short as 540 fs with dispersion compensation and 1.7-ps pulses without dispersion compensation.
C, Honninger, G, Zhang, U, Keller, A, Giesen   +3 more
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An integrated saturable absorber employing spatial solitons

Proceedings of 5th European Quantum Electronics Conference, 1995
Semiconductors and in particular AlGaAs, have proved to be optimum nonlinear materials when operated below the half band gap. Large phase shifts have been observed, with a minimal nonlinear absorption. The large nonlinear refractive index found in AlGaAs can also be used to observe spatial solitons, at lower power levels that have previously been ...
J.S. Aitchison, A. Villeneuve, J.U. Kang, P.G. Wigley, G.I. Stegeman   +4 more
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A saturable absorber for the iodine laser

Optics Communications, 1976
Abstract An absorber for iodine laser pulses has been developed using iodine atoms in the ground state as the absorbing species. The iodine atoms have been produced by dissociation of gaseous molecular iodine in a heated cell. The absorption is easily saturated at moderate energy densities.
Fill, E., Hohla, K.
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LIGHT AMPLIFICATION IN SATURABLE ABSORBERS

Applied Physics Letters, 1968
It has been found that an absorber driven into saturation by a strong light pulse can amplify a weak light pulse simultaneously incident upon the medium. Gains as high as 20 cm−1 have been observed. This effect is believed to be related to the ability of a saturable absorber to bring about mode locking in a laser cavity.
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Broadband Few‐Layer MoS₂ Saturable Absorbers

Advanced Materials, 2014
The bandgaps of monolayer and bulk molybdenum sulfide (MoS2 ) result in that they are far from suitable for application as a saturable absorption device. In this paper, the operation of a broadband MoS2 saturable absorber is demonstrated by the introduction of suitable defects.
Shuxian, Wang, Haohai, Yu, Huaijin, Zhang, Aizhu, Wang, Mingwen, Zhao, Yanxue, Chen, Liangmo, Mei, Jiyang, Wang   +7 more
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Solid-state low-loss intracavity saturable absorber for Nd:YLF lasers: an antiresonant semiconductor Fabry–Perot saturable absorber

Optics Letters, 1992
We introduce a new low-loss fast intracavity semiconductor Fabry-Perot saturable absorber operated at anti-resonance both to start and sustain stable mode locking of a cw-pumped Nd:YLF laser. We achieved a 3.3-ps pulse duration at a 220-MHz repetition rate. The average output power was 700 mW with 2 W of cw pump power from a Ti:sapphire laser.
U, Keller, D A, Miller, G D, Boyd, T H, Chiu, J F, Ferguson, M T, Asom   +5 more
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Surface-normal saturable absorber intensity modulator

International Conference onIndium Phosphide and Related Materials, 2003., 2003
We present a surface-normal semiconductor intensity modulator based on optically pumped saturable absorber mirror. The modulation section consists of quantum wells placed within a Fabry-Perot cavity. A laser integrated monolithically within the modulator structure generates the control beam used to pump the absorber.
A. Vainionpaa, M. Guina, A. Harkonen, L. Orsila, J. Lyytikainen, M. Pessa, O.G. Okhotnikov   +6 more
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