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17 March 2023 Interband cascade lasers emitting beyond 6μm in cw by mitigation of valence intersubband absorption
Robert Weih, Josephine Nauschütz, Benedikt Schwarz, Hedwig Knötig, Johannes Koeth
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Proceedings Volume PC12440, Novel In-Plane Semiconductor Lasers XXII; PC124400A (2023) https://doi.org/10.1117/12.2657031
Event: SPIE OPTO, 2023, San Francisco, California, United States
Abstract
We present GaSb based interband cascade lasers with a center emission wavelength of 6170 nm that emit in cw operation up to a temperature of 40°C. While the pulsed threshold current density for a broad area laser is as low as 500 A/cm² at a temperature of 20°C a ridge waveguide laser with 23µm ridge width reaches more than 25mW of output power, the results were achieved by careful optimizations of the active region design, the waveguide design and epi down mounting of the laser chips.
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Robert Weih, Josephine Nauschütz, Benedikt Schwarz, Hedwig Knötig, and Johannes Koeth "Interband cascade lasers emitting beyond 6μm in cw by mitigation of valence intersubband absorption", Proc. SPIE PC12440, Novel In-Plane Semiconductor Lasers XXII, PC124400A (17 March 2023); https://doi.org/10.1117/12.2657031
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KEYWORDS
Quantum cascade lasers
Absorption
Continuous wave operation
Cladding
Gases
Indium arsenide
Metals
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