Control of laser radiation parameter

Narrowing of the angular distribution of the radiation emitted by high-power injection lasers with a wide stripe contact by an external microselector

V. V. Bezotosnyi, V. P. Konyaev, N. V. Markova, G. G. Kharisov

P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow

Abstract: An investigation was made of the spatial and power characteristics of quantum-well heterolasers consisting of InGaAs/AlGaAs/GaAs heterostructures and emitting at 940 nm. An external microselector was used to obtain a nearly single-lobe angular distribution of the radiation from a laser with a stripe contact 50 μm wide. The maximum radiation power in the main lobe, characterised by the diffraction-limit divergence, was ~185 mW. At a fixed pump current the power delivered by the main lobe with the diffraction-limit divergence was 55% of the power of the same laser without the selector.

UDC: 621.373.826.038.825.4

PACS: 42.60.Jf, 42.55.Px

Received: 09.07.1993

 English version: Quantum Electronics, 1994, 24:1, 54–55

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