Abstract
We demonstrate a quantum cascade ring laser with high power room temperature continuous wave operation. A second order distributed feedback grating buried inside the waveguide provides both in-plane feedback and vertical power outcoupling. Total output power reaches 0.51 W at an emission wavelength around 4.85 m. Single mode operation persists up to 0.4 W. The far field analysis indicates that the device operates in a high order mode. The magnetic and electric components of the ring-shaped lasing beam are in radial and azimuthal directions, respectively.
Original language | English (US) |
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Article number | 261104 |
Journal | Applied Physics Letters |
Volume | 99 |
Issue number | 26 |
DOIs | |
State | Published - Dec 26 2011 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)