Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 21, Issue 9-12, Pages 814-816Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2009.2019117
Keywords
Continuous wave (CW); distributed feedback (DFB); quantum-cascade (QC) laser; single-mode
Funding
- Swiss Commission for Technology and Innovation (CTI)
- Swiss National Science Foundation
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Single-mode lasers operating at lambda approximate to 9 mu m in continuous wave up to 423 K (150 degrees C) were achieved by the combination of strong distributed-feedback coupling, a narrow gain active region design, low intersubband, and free-carrier losses as well as a good thermal management. Tuning of 10 cm(-1) or 0.9% of the center frequency was achieved by heating the device. The threshold current density varies from 1.1 kA/cm(2) at 303 K to 2.4 kA/cm(2) at 423 K. Other devices with low electrical power consumption of 1.6 and 3.8 W for an optical output power of 16 and 100 mW have been demonstrated at 263 K.
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