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\lambda \sim {3.35} \mu m Distributed-Feedback Quantum-Cascade Lasers With High-Aspect-Ratio Lateral Grating

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8 Author(s)
Thomas J Slight ; Compound Semiconductor Technologies Ltd., Glasgow, U.K. ; Giuseppe Tandoi ; Dmitry G Revin ; Andrew McKee
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We report the development of room-temperature distributed-feedback quantum-cascade lasers operating in a single mode in the 3.34 to 3.35 μm wavelength range. First-order lateral gratings with high aspect ratio (the ratio between the grating etch depth and its period) were formed using inductively coupled plasma etching. The as-cleaved lasers emit in pulsed regime with a sidemode suppression ratio of up to 24 dB and a peak single-mode output power of 130 mW from a single facet.

Published in:

IEEE Photonics Technology Letters  (Volume:23 ,  Issue: 7 )