Coherent light generators – Particular component circuitry – Optical pumping
Patent
1987-10-21
1989-11-14
Laroche, Eugene R.
Coherent light generators
Particular component circuitry
Optical pumping
372 21, G02F 100
Patent
active
048802956
ABSTRACT:
The output of an optical device which involves a stimulated brillouin scattering (SBS) gain medium is enhanced over a range of input beam intensities by providing a gain medium which has a given SBS gain for a given input beam intensity, and modifying the gain medium to reduce its SBS gain coefficient. By lowering the SBS gain coefficient, SBS dominance and suppression of stimulated Raman scattering (SRS) can be mitigated, and the output fidelity of a phase conjugation system with respect to its input can be significantly enhanced. Mechanisms for reducing the SBS gain coefficient include increasing the medium viscosity, thermal conductivity and/or diffusion coefficient, or causing the medium relaxation zone to coincide with the frequency of the phonons involved in the SBS process. Two different media can be mixed together in varying proportions to progressively modify the overall medium SBS gain as the input beam intsnsity is progressively changed.
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Jones Dennis C.
Mangir Metin S.
Rockwell David A.
White Jeffrey O.
Duraiswamy V. D.
Hughes Aircraft Company
Karambelas A. W.
LaRoche Eugene R.
McCutcheon Nathan W.
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