Monolithically integrated semiconductor optical preamplifier

Details Monolithically integrated semiconductor optical preamplifier Monolithically integrated semiconductor optical preamplifier

1990-05-09

1992-04-07

Epps, Georgia

Coherent light generators

Particular active media

Semiconductor

357 19, 372 45, 372 46, 372 8, H01S 319

Patent

active

051034557

ABSTRACT:
An optical preamplifier includes a semiconductor optical amplifier monolithically integrated with an optical detector and electrically isolated from the detector by an isolation region. The isolation region consists of a low-loss, preferably transparent, insulating material whose index of refraction is matched to at least the refractive index of the amplifier, leading to reduced facet reflectivity at the amplifier output facet. Alternative device structures may include a waveguiding layer in the isolation region, a grating integrated with or following the optical amplifier, and a tuning region positioned between the amplifier and isolation region for filtering spontaneous emission.

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