Journal
ELECTRONICS LETTERS
Volume 45, Issue 2, Pages 107-U30Publisher
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/el:20093057
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Funding
- DARPA [W911QX-07-C-0041]
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A grating-coupled external cavity quantum cascade laser operating in continuous-wave at room temperature is reported. Single-frequency operation tunable over more than 160 cm(-1) around the centre wave-length of 4.6 mu m has been observed at a chip temperature of 300 K. The maximum optical power at the gain peak was 300 mW, corresponding to a wall-plug efficiency of 6%. Observed power output at the gain bandwidth edges was in excess of 125 mW.
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