Results 241 to 250 of about 13,087 (290)

Scaling of the antiresonant Fabry–Perot saturable absorber design toward a thin saturable absorber

Optics Letters, 1995
We 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, L R, Brovelli, M, Kamp, U, Keller, M, Moser   +4 more
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Lifetimes of Saturable Absorbers

Nature, 1966
THE 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, W. E. K. GIBBS, J. TREGELLAS-WILLIAMS   +2 more
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Study of Saturable Absorber Switching Efficiencies

Journal of Applied Physics, 1969
Theoretical 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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Graphene-Plasmonic Hybrid Metasurface Saturable Absorber

OSA Advanced Photonics Congress 2021, 2021
We demonstrate saturable absorption and ultrafast recovery of subwavelength (~λ/5) graphene-plasmonic hybrid metasurfaces. Measurements indicate a saturation fluence as low as 0.15μJ/cm2 and a recovery time <60fs at infrared wavelengths.
Md Zubair Ebne Rafique, Ali Basiri, Jing Bai, Jiawei Zuo, Yu Yao   +4 more
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An Analysis of Saturable Absorbers

Applied Optics, 1967
This 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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Silicon-germanium saturable absorber mirrors

The 17th Annual Meeting of the IEEELasers and Electro-Optics Society, 2004. LEOS 2004., 2004
A silicon-germanium ultra-broadband saturable Bragg reflector with sub-picosecond recovery time is fabricated. Its performance is demonstrated by mode-locking an Er-Yb glass laser generating 220 fs pulses spanning the C-band of the optical communication range.
F.J. Grawert, S. Akiyama, J.T. Gopinath, F.O. Ilday, J. Liu, H. Shen, K. Wada, L.C. Kimmerling, E.P. Ippen, F.X. Kaertner   +9 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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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
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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
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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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