Semiconductor laser apparatus

Details Semiconductor laser apparatus Semiconductor laser apparatus

2005-03-02

2008-11-25

Harvey, Minsun (Department: 2828)

Coherent light generators

Particular active media

Semiconductor

C372S050120, C372S050122

Reexamination Certificate

active

07457339

ABSTRACT:
Arrayed DBR (Distributed Bragg Reflector) laser shows a problem that spectrum purity is deteriorated when a current is flowed in a semiconductor optical amplifier for attaining a sufficient optical output. In addition, the arrayed waveguide grating laser shows a problem that the spectrum purity is deteriorated by leakage of light. An output end of each of the laser channels is provided with a gate (a core) that can be controlled through bias application. The gate has a function for amplifying light when the laser channels are operated and for absorbing light when the laser channels are not operated.

REFERENCES:
patent: 5805755 (1998-09-01), Amersfoort et al.
Naoki Fujiwara et al., “Inherently Mode-Hop-Free Distributed Bragg Reflector (DBR) Laser Array”, IEEE Journal of Selected Topics in Quantum Electronics, vol. 9, No. 5 (Sep./Oct. 2003), pp. 1132-1137.

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