摘要
We present a surface metal grating distributed feedback quantum cascade laser emitting atλ~8.3μm and operating above 400 K in pulsed mode.A very high peak power of 463 mW at 290 K and still more than 18 mW at 400 K is achieved for a high-reflectivity-coated 13-μm-wide and 2.5-mm-long laser.Single-mode emission with a high side mode suppression ratio and wide temperature tuning range is observed.Such a high-power single-mode laser with a simple device process is important for practical applications.
基金
Supported by the National Basic Research Program of China under Grant No 2006CB604903
the National Natural Science Foundation of China under Grant Nos 60736031,60806018 and 60906026.
