Semiconductor laser element capable of changing emission wavelen

Details Semiconductor laser element capable of changing emission wavelen Semiconductor laser element capable of changing emission wavelen

1990-04-04

1992-02-11

Davie, James W.

Coherent light generators

Particular beam control device

Tuning

372 50, 372 96, 385 2, H01S 310

Patent

active

050880977

ABSTRACT:
A wavelength selective filter capable of changing a selected wavelength over a wide range, andd a method for driving such a filter. The wavelength selective filter has a substrate and an optical waveguide layer including a superlattice structure on the substrate. The optical waveguide layer includes a reflection portion and an optical waveguide portion which are juxtaposed in a light propagation direction. A diffraction grating is formed in the reflection portion of the optical waveguide layer, and an electrode is formed in the reflection portion for applying voltage.

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patent: 4829535 (1989-05-01), Utaka
patent: 4856005 (1989-08-01), Oe et al.
patent: 4873691 (1989-10-01), Uomi et al.
patent: 4887274 (1989-12-01), Hayakawa et al.
patent: 4899361 (1990-02-01), Numai
patent: 4920542 (1990-04-01), Brosson et al.

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