High performance index-coupled quantum cascade distributed feedback (QC-DFB) lasers operating at λ≈8.5μm are reported. Reliable dynamic single-mode emission with a side mode suppression ratio ≥30dB is obtained. The continuous single-mode tuning range is 140 nm. In pulsed operation a record high peak output power of 60 mW at 300 K is achieved. We further report on the first continuous-wave QC-DFB lasers. These devices display an output power of 10 mW at 120 K.
|Original language||English (US)|
|Number of pages||3|
|Journal||Applied Physics Letters|
|State||Published - 1998|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)