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Mid-infrared W quantum-well lasers for noncryogenic continuous-wave operation

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Abstract

We review the recent progress of electrically injected and optically pumped mid-IR lasers based on antimonide quantum wells with the type II W configuration. W quantum-well diodes have achieved cw operation up to 195 K at λ = 3.25 µm. Optically pumped devices that employ the diamond pressure bond heat sink have reached 290 K at 3 µm and 210 K at 6 µm. Pulsed power conversion efficiencies of up to 7% at 220 K have been attained by use of an optical pumping injection cavity approach, in which an etalon cavity for the pump beam significantly enhances its absorptance. The angled-grating distributed-feedback configuration has been used to obtain near-diffraction-limited output for an optical pumping stripe width of 50 µm.

© 2001 Optical Society of America

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