Diffraction grating with alternately-arranged different regions,

Details Diffraction grating with alternately-arranged different regions, Diffraction grating with alternately-arranged different regions,

1997-03-13

1999-07-20

Bovernick, Rodney

Coherent light generators

Particular resonant cavity

Distributed feedback

372 45, 372 50, 372102, H01S 319

Patent

active

059264977

ABSTRACT:
A diffraction grating includes first regions for mainly reflecting first polarized light and second regions for mainly reflecting second polarized light. The first regions and the second regions are alternately arranged in a light propagation direction in a variety of manners to appropriately set its polarization-mode dependency according to need. An optical semiconductor device includes a semiconductor substrate, a laser structure and that diffraction grating formed in the laser structure. The laser structure is a distributed feedback semiconductor laser structure or a distributed Bragg reflector semiconductor laser structure formed on the semiconductor substrate.

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patent: 5208824 (1993-05-01), Tsang
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patent: 5471335 (1995-11-01), Nitta
patent: 5574289 (1996-11-01), Aoki et al.
patent: 5586131 (1996-12-01), Ono et al.
patent: 5606176 (1997-02-01), Nitta

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