Abstract
We report the fabrication of single mode quantum cascade lasers using a shallow-etched distributed Bragg reflector as frequency selective element. Quasi-continuous single mode tuning over 15 cm(-1) at room temperature and 25 cm(-1) via temperature tuning at Peltier temperatures is demonstrated. The behavior of both electro-optic and spectral characteristics under variation of the segment currents is analyzed, showing a maximum peak output power at room temperature of 600 mW. Thermal crosstalk between the laser segments is investigated. The spectral resolution of a gas absorption experiment is determined to be better than 0.0078 cm(-1). (C) 2012 Optical Society of America
| Original language | English |
|---|---|
| Pages (from-to) | 3890-3897 |
| Number of pages | 8 |
| Journal | Optics Express |
| Volume | 20 |
| Issue number | 4 |
| Publication status | Published - 13 Feb 2012 |