Fishing – trapping – and vermin destroying
Patent
1989-09-26
1991-09-03
Chaudhuri, Olik
Fishing, trapping, and vermin destroying
148DIG95, 148DIG119, 156654, 156662, 437 81, 437133, H01L 2120, H01L 21203
Patent
active
050454994
ABSTRACT:
Disclosed are a distributed Bragg reflector type semiconductor laser and a method of manufacturing such a laser a high yields, in which the upper surface of an active waveguide is covered by an external waveguide, the external waveguide at side portions thereof, the external waveguide is coupled with the edge surfaces of the active waveguide without any gap remaining, and the coupling ratio of the active waveguide and external waveguide is high.
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Tohmori et al., "Bundle-Integrated-Guide (BIG) Distributed-Bragg-Reflector (DBR) Lasers", Trans. Inst. Electron. Inf. 8 Commun. eng. E, May 1987, vol. E70, No. 5, pp. 494-503.
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Nishizawa Hideaki
Suematsu Yasuharu
Takahashi Mitsuo
Bunch William
Chaudhuri Olik
Research Development Corporation of Japan
Sumitomo Electric Industries Ltd.
Tokyo Institute of Technology
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