| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Design and Fabrication of Six-Channel Complex-Coupled DFB Quantum Cascade Laser Arrays Based on a Sampled Grating |
| YAN Fang-Liang1,2, ZHANG Jin-Chuan1,2**, YAO Dan-Yang1,2, TAN Song1,2, LIU Feng-Qi1,2**, WANG Li-Jun1,2, WANG Zhan-Guo1,2 |
1Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083
2Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices, Beijing 100083
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YAN Fang-Liang, ZHANG Jin-Chuan, YAO Dan-Yang et al 2014 Chin. Phys. Lett. 31 014209 |
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Abstract 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 74 nm centered at a wavelength of 7.55 μm 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 82 mW with a small difference in slope efficiency from 100 to 128 mW/A.
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Received: 17 October 2013
Published: 28 January 2014
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