Coherent light generators – Particular resonant cavity – Distributed feedback
Patent
1995-09-28
1998-01-27
Bovernick, Rodney B.
Coherent light generators
Particular resonant cavity
Distributed feedback
372 45, H01S 319
Patent
active
057128650
ABSTRACT:
A temperature-insensitive vertical-cavity surface-emitting laser (VCSEL) and method for fabrication thereof. The temperature-insensitive VCSEL comprises a quantum-well active region within a resonant cavity, the active region having a gain spectrum with a high-order subband (n.gtoreq.2) contribution thereto for broadening and flattening the gain spectrum, thereby substantially reducing any variation in operating characteristics of the VCSEL over a temperature range of interest. The method for forming the temperature-insensitive VCSEL comprises the steps of providing a substrate and forming a plurality of layers thereon for providing first and second distributed Bragg reflector (DBR) mirror stacks with an active region sandwiched therebetween, the active region including at least one quantum-well layer providing a gain spectrum having a high-order subband (n.gtoreq.2) gain contribution, and the DBR mirror stacks having predetermined layer compositions and thicknesses for providing a cavity resonance within a predetermined wavelength range substantially overlapping the gain spectrum.
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Choquette Kent D.
Chow Weng W.
Gourley Paul L.
Bovernick Rodney B.
Hohimer John P.
Sandia Corporation
Song Yisun
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