Optical amplifiers

Optimal detection of partially spatial coherent radiation by using optical quantum amplifiers

G. I. Kozin, A. P. Kuznetsov

Moscow Engineering Physics Institute (State University)

Abstract: Conditions for the efficient detection of reflected laser radiation by means of optical quantum amplifiers are considered theoretically. It is shown that in the case of a strongly disturbed spatial coherence, there is no need to take it into account and a simple geometrical consideration is sufficient. The expressions relating the effective radius of the input aperture and the angular magnification of a projecting optical system with the laser radiation divergence and amplifier parameters are obtained. The theoretical results are confirmed by experiments.

PACS: 42.68.Wt, 42.25.Kb

Received: 07.09.2004
Revised: 08.09.2005

 English version: Quantum Electronics, 2005, 35:11, 1009–1012

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