Output control of vertical microcavity light emitting device

Details Output control of vertical microcavity light emitting device Output control of vertical microcavity light emitting device

1997-03-26

1999-04-06

Davie, James W.

Coherent light generators

Particular active media

Semiconductor

372 96, 372 99, H01S 319

Patent

active

058927867

ABSTRACT:
An improved intracavity sensor based output power control for microcavity light emitting devices. An improved phototransistor transducer is both configured and physically disposed so that it passively transmits the spurious optical energy output of the microcavity light emitting device while simultaneously generating a light determined electrical signal of easily used large magnitude that is nearly free of error. The base-collector region of the transistor is disposed with a quantum well absorbing layer and produces a signal responsive to a selected emission wavelength. The configuration of the optical energy communicating transducer is arranged so that it is improved in sensitivity and especially in selectivity in generating the laser feedback signal.

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