Optical filter device

Details Optical filter device Optical filter device

1988-04-13

1990-02-06

Davie, James W.

Coherent light generators

Particular active media

Semiconductor

372 45, 372 96, H01S 319

Patent

active

048993611

ABSTRACT:
An optical filter device having an amplifying region including an active layer for amplifying light of a first predetermined wavelength band, a noise absorption region including a noise absorption layer which is transparent for light of the first predetermined wavelength band, and which absorbs light of a second predetermined wavelength band, a distributed feedback region positioned between the amplifying layer and noise absorption regions, and including no active layer and no noise absorption layer, electrodes provided on the top and back surfaces of the amplifying, noise absorption, and distributed feedback regions, and non-reflection structures provided on both outer end facets of the amplifying and noise absorption regions, wherein the amplifying, noise absorption, and distributed feedback regions include a common optical guiding layer, and a bandgap energy of the noise absorption layer is smaller than that of the optical guiding layer, and is larger than that of the active layer.

REFERENCES:
patent: 4751719 (1988-06-01), Mito et al.
S. R. Chinn et al., "Analysis of the Transmission . . . Amplifiers", Optics Communications, vol. 10, No. 2, Feb. 1974, pp. 123-126.

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