Light emitting device module

Details Light emitting device module Light emitting device module

1997-06-18

1999-11-30

Lee, John D.

Optical waveguides

With optical coupler

Particular coupling structure

372 92, 372102, H01S 308, G02B 630

Patent

active

059956925

ABSTRACT:
The present invention relates to a light emitting device module which can easily be made and can yield a stable output characteristic, and a method of making the same. The light emitting device module in according to the present invention comprises a semiconductor device in which an active region having a light exit facet and a light reflecting facet with a lower light reflectivity than the light exit facet respectively at both ends is fabricated along a predetermined reference axis, and an optical fiber having a grating provided along the longitudinal direction of the core region and an end facet arranged so as to face the light exit facet. In particular, in the light emitting device module according to the present invention, the light exit facet of the active region is inclined with respect to the light reflecting facet of the active region by a predetermined angle, thereby the light reflecting facet of the active region and the grating constitute an external cavity through the light exit facet.

REFERENCES:
patent: 5699377 (1997-12-01), Pan
Lin, "Superluminescent Diodes with Angled Facet Etched by Chemically Assisted Ion Beam Etching", Electronics Letters, vol. 27, No. 11, pp. 968-970, May 1991.
Lin, "The Influence of Facet Roughness on the Reflectivities of Etched-Angled Facets for Superluminescent Diodes and Optical Amplifiers", IEEE Photonics Technology Letters, vol. 4, No. 2, pp. 127-129, Feb. 1992.
Collar et al, "Low Residual Reflectivity of Angled-Facet Semiconductor Laser Amplifiers", IEEE Photonics Technology Letters, vol. 2, No. 8, SEI 97-11, A1, Aug. 1990, pp. 553-555.
Nakano et al, "Fabrication and Characteristics of an Integrated DFB Laser/Amplifier Having Reactive-Ion-Etched Tilted End Facets", Japanese Journal of Applied Physics, vol. 29, No. 12, SEI 97-11, Dec. 1990, pp. 2430-2433.
Campbell et al, "A Wavelength Stable Uncooled Laser for Access Networks", 21st Eur. Cont. on Opt. Comm. (ECOC'95-Brussels) A2, pp. 545-548, (1995).

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