Journal
CHINESE PHYSICS LETTERS
Volume 31, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0256-307X/31/1/014209
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Funding
- National Basic Research Program of China [2013CB632801, 2013CB632803, 2011YQ13001802-04]
- National Natural Science Foundation of China [61306058, 61274094, 10990103]
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We designed and fabricated a six-channel complex-coupled distributed feedback (DFB) quantum cascade laser arrays based on a sampled Bragg grating. The six-channel DFB laser arrays exhibit a linear tuning range of 74nm centered at a wavelength of 7.55 mu m at room temperature. Robust single-mode emission with a side mode suppression ratio about 20 dB was observed, even at full power. The used sampled grating and reflectivity coating on the back facet lead to the peak output power varying from 55 to 82mW with a small difference in slope efficiency from 100 to 128mW/A.
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