Control of laser radiation parameters

Intracavity fiber-optic stabilization of the transverse distribution in a field of a semiconductor laser

A. N. Pechenov, S. D. Skorbun

P. N. Lebedev Physical Institute, the USSR Academy of Sciences, Moscow

Abstract: Stabilization of the transverse distribution of the field in a semiconductor laser by introduction of a fiber-optic corrector inside the resonator was proposed and realized. The angular distribution of the radiation from such a laser fiber-optic screen was close to the diffraction limit, governed by the core of the fiber, and was independent of the pump current (up to a 300-fold excess above the lasing threshold). Introduction of such a corrector did not result in deterioration of the power and threshold characteristics of the laser, so that the brightness could be increased by a factor of 10–15 compared with a conventional laser screen.

UDC: 621.373.826.038.825.4

PACS: 42.55.Px, 42.81.Wg, 42.60.Da, 42.60.Lh, 42.60.Jf

Received: 11.06.1988
Revised: 30.01.1989

 English version: Soviet Journal of Quantum Electronics, 1990, 20:1, 37–39

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