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JOURNALS // Kvantovaya Elektronika // Archive

Kvantovaya Elektronika, 1978 Volume 5, Number 9, Pages 2038–2041 (Mi qe10768)

Brief Communications

Influence of the operation regime of an injection laser on the efficiency of coupling of its radiation into an optical waveguide

P. G. Eliseev, V. N. Lavrov, Yu. M. Popov


Abstract: A study was made of the efficiency of coupling of radiation emitted by heterolasers (including lasers made of new multicomponent compounds and emitting at 1.08 μ) into a multimode fiber by direct contact or by matching with a microlens at the fiber end. A coupling efficiency up to 0.9 was obtained using a strip heterolaser and an SiO2 fiber (light losses ~25 dB/Km). An increase in the pump current lowered the coupling efficiency. Experiments on a single-mode heterolaser with an external selective resonator showed that one of the reasons for the nonmonotonic dependence of the coupling efficiency on the pump current was the mode deformation as a result of self-focusing effects.

UDC: 621.372.8

PACS: 42.80.Mv, 42.55.Px

Received: 04.10.1977
Revised: 31.01.1978


 English version:
Soviet Journal of Quantum Electronics, 1978, 8:9, 1150–1152


© Steklov Math. Inst. of RAS, 2025