Results 251 to 260 of about 154,423 (300)

Amplifier/compressor fiber Raman lasers

Annual Meeting Optical Society of America, 1987
When pump and Stokes pulses copropagate in a fiber Raman laser (FRL), the weaker Stokes spectrum is severely broadened through pump-induced cross-phase modulation (XPM).1 Thus, in an FRL during Raman amplification, the pulse is chirped through XPM, and then the linear anomalous dispersion of a fiber can compress the pulse.
M N, Islam, L F, Mollenauer, R H, Stolen, J R, Simpson, H T, Shang   +4 more
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Ultrafast disk lasers and amplifiers

SPIE Proceedings, 2012
Disk lasers with multi-kW continuous wave (CW) output power are widely used in manufacturing, primarily for cutting and welding applications, notably in the automotive industry. The ytterbium disk technology combines high power (average and/or peak power), excellent beam quality, high efficiency, and high reliability with low investment and operating
Dominik Bauer, Jochen Kleinbauer, Aleksander Budnicki, Martin Wolf, Chuong Tan, Raphael Gebs, Philipp Wagenblast, Sascha Weiler, Dirk Sutter   +8 more
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Amplified Extended Modes in Random Lasers

Physical Review Letters, 2004
We report on a new random laser phenomenon that gives rise to narrow emission modes without requiring optical cavities. Sharp emission peaks are observed experimentally over a broad range of scattering strengths and analyzed in numerical calculations.
MUJUMDAR S., RICCI, MARILENA, TORRE, RENATO, WIERSMA, DIEDERIK SYBOLT   +3 more
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Amplified spontaneous emission (ASE) in laser oscillators and amplifiers

IEEE Journal of Quantum Electronics, 1983
Dye-laser oscillators and amplifiers are studied theoretically with inclusion of amplified spontaneous emission (ASE). Assuming pencil-like geometry in both cases, laser signal intensity and ASE intensity are described with appropriate photon-transport equations.
Haag, G., Munz, M., Marowsky, G.
openaire   +2 more sources

Laser Oscillator/Amplifier Systems

SPIE Proceedings, 1986
The beam characteristics from two 2kW CO 2 lasers coupled as an oscillator/amplifier pair is discussed with particular reference to the power gain and mode structure variations generated in the amplifier section. It was found that gain saturation, plasma saturation and beam clipping phenomenon were the dominant effects governing power amplification ...
S T. Shah, W M. Steen
openaire   +1 more source

Regenerative Ruby Laser Amplifiers

Journal of the Optical Society of America, 1966
An ideal laser amplifier was previously treated as a three-medium transmission system. It was predicted that for a given length, the gain would rise with negative attenuation (population inversion), reach a maximum, decrease rapidly at first, and then gradually approach zero asymptotically.The theory has been tested experimentally, using ruby at liquid-
H. Jacobs, J. Castro, F. A. Brand, C. LoCascio, S. Weitz, G. Novick   +5 more
openaire   +1 more source

Amplified Spontaneous Emission Effects In Laser Amplifiers

SPIE Proceedings, 1989
We investigate the effects of amplified spontaneous emission on laser amplifier performance. In particular, we are interested in the dependence of gain, signal to noise ratio and efficiency on excitation, facet reflectivity and input laser intensity.
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Semiconductor Laser Power Amplifier

SPIE Proceedings, 1987
ABSTRACT Wide stripe semiconductor lasers can be used as optical power amplifiers for obtaining high power single spatial mode output beams. Anti-reflection coatings deposited on the facets of semiconductor lasers effectively suppress any self-oscillation.
S. H. Macomber, P. Akkapeddi, A. Montroll   +2 more
openaire   +1 more source

Seeding a laser amplifier

Science, 2018
Optics Amplification of femtosecond laser pulses requires a lasing medium or a nonlinear crystal. The chemical properties of the lasing medium or adherence to momentum conservation rules in the nonlinear crystal constrain the frequency and the bandwidth of the amplified pulses.
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Waveguide dye laser amplifier

Journal of Applied Physics, 1973
A single-stage flash-lamp-pumped waveguide dye laser amplifier is presented. A Pyrex cylindrical dye cell filled with a rhodamine 6G solution in ethanol acts as an active hollow dielectric waveguide for the light to be amplified. Over-all efficiency and absolute energy gain are about one order of magnitude larger than for a conventional single-pass dye
P. Burlamacchi, R. Pratesi, R. Salimbeni
openaire   +1 more source