Coherent light generators – Particular active media – Semiconductor
Patent
1991-07-29
1993-02-09
Lee, John D.
Coherent light generators
Particular active media
Semiconductor
372 50, H01S 319
Patent
active
051857545
ABSTRACT:
A laser diode construction having internal reflectors within the laser cavity to provide a stable spectral mode of laser operation. The laser includes a plurality of contiguous semiconductor layers disposed on a substrate to form a semiconductor body with at least one layer forming an active region. Electrically conductive contacts bias the heterostructure to inject current into the active region and produce lightwaves. Feedback means define two or more tandem resonant optical cavities to achieve lasing operation. The feedback means includes at least one internal light reflector within the semiconductor body. In a preferred embodiment, a pair of spaced apart internal reflectors are provided with the region between the pair also being electrically pumped to define an active internal etalon. Other embodiments have multiple periodic reflectors or combine internal reflectors with feedback gratings or passive windows at the end facets of the body.
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Craig Richard R.
Gignac William J.
Scifres Donald R.
Welch David F.
Zucker Erik P.
Lee John D.
Spectra Diode Laboratories, Inc.
Wise Robert E.
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