Abstract
We demonstrate high power continuous-wave room-temperature operation surface-grating distributed feedback quantum cascade lasers at 4.8 μm. High power single mode operation benefits from a combination of high-reflection and antireflection coatings. Maximum single-facet continuous-wave output power of 2.4 W and peak wall plug efficiency of 10% from one facet is obtained at 298 K. Single mode operation with a side mode suppression ratio of 30 dB and single-lobed far field without beam steering is observed.
Original language | English (US) |
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Article number | 181106 |
Journal | Applied Physics Letters |
Volume | 98 |
Issue number | 18 |
DOIs | |
State | Published - May 2 2011 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)