Results 261 to 270 of about 88,499 (309)

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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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

Pulse shaping with saturable absorbers

1974 International Electron Devices Meeting (IEDM), 1974
An active pulse shaper which can generate time waveforms which are very different from those produced naturally by laser oscillators has been devised. The system, which is in effect an optical shutter with variable transmission, consists of an array of bleachable dye cells.
R. A. Elliott, G. A. Massey
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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.
openaire   +2 more sources

Modeling absorption in saturable absorbers

Optics Communications, 2001
Abstract Non-linear absorption in boric acid glass films with 10−4 M concentration of fluorescein and rhodamine 6G was measured with beam intensity variation covering six orders of magnitude. The non-linear absorption in these systems has been interpreted in terms of the four-level model of saturable absorbers.
Alok Sharan, Ramesh C Sharma, S.N Sandhya, Arvind Ayyer, K.K Sharma   +4 more
openaire   +1 more source

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
openaire   +1 more source

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.
openaire   +1 more source

Broadband Few-Layer MoS2 Saturable Absorbers

Advanced Materials, 2014
Haohai Yu, Yanxue Chen, Mingwen Zhao
exaly