Amplified spontaneous emission and signal amplification in dye-laser systems

Journal Article · Sat Nov 01 04:00:00 EST 1975 · IEEE J. Quant. Electron.; (United States)

DOI:https://doi.org/10.1109/JQE.1975.1068543· OSTI ID:7270632

Ganiel, U; Hardy, A; Neumann, G; Treves, D

Transversely pumped dye-laser systems were investigated theoretically and experimentally. A set of coupled rate equations for the excited-state population densities and for the photon fluxes in both directions, at all wavelengths, is presented. Both the temporal and spatial dependence of these quantities are accounted for. The equations are solved numerically for a variety of practical situations, and analytical approximations for some limiting cases are discussed. The results describe the dependence of the amplified-spontaneous-emission (ASE) output flux on pumping rate, the spectral narrowing process, and the effects of gain saturation. It is found that under practical laboratory conditions the gain of such dye systems saturates rapidly. Consequently, at high pumping rates the output varies linearly with pump intensity, and the conversion efficiency from pump to ASE photons approaches unity. The performance of dye-laser amplifiers is described by the same set of equations, and the gain characteristics of such systems are analyzed as a function of input signal intensity and pumping rate. The theoretical calculations are compared with the results of a set of experiments, and good agreement is found. The operation characteristics of a dye-laser amplifier are evaluated and utilized in the design of a narrow-band oscillator-amplifier system.

• Research Organization: Weizmann Inst. of Science, Rehovot, Israel
• OSTI ID: 7270632
• Journal Information: IEEE J. Quant. Electron.; (United States), Journal Name: IEEE J. Quant. Electron.; (United States) Vol. QE-11:11; ISSN IEJQA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
AMPLIFIERS
DYE LASERS
ELECTRONIC EQUIPMENT
GAIN
LASERS
PERFORMANCE