| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Single Mode 2 μm GaSb Based Laterally Coupled Distributed Feedback Quantum-Well Laser Diodes with Metal Grating |
| SONG Yu-Zhi, ZHANG Yu, SONG Jia-Kun, LI Kang-Wen, ZHANG Zu-Yin, XU Yun**, SONG Guo-Feng, CHEN Liang-Hui |
Nano-Optoelectronics Laboratory, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083
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SONG Yu-Zhi, ZHANG Yu, SONG Jia-Kun et al 2015 Chin. Phys. Lett. 32 074206 |
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Abstract Room-temperature operation of a GaSb based laterally coupled distributed feedback quantum-well laser diode emitting at 2 μm is demonstrated. The device exhibits single longitudinal mode characteristic as a result of the first order Cr-Bragg gratings alongside the narrow ridge waveguide. We design the laser structure to obtain a critical coupling condition corresponding to a coupling coefficient of 12 cm?1. For a 1-mm-long uncoated laser diode with a 3-μm-wide stripe, a single mode output spectrum with side mode suppression ratio as high as 28.5 dB is achieved, and the maximum single mode continuous-wave output power is about 11 mW at room temperature.
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Received: 07 April 2015
Published: 30 July 2015
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