Abstract
The first long wavelength infrared quantum cascade (QC) disk laser operating up to a wavelength as long as 11.6 μm is reported. In the present structure, based `two-well vertical transition', the microcavity regime of the QC disk laser with both an increase in the emission wavelength and a decrease of the disk size is described. The most important feature accompanying the size-reduction of the laser cavity is the reduction of the mode density, which is described by the so called beta factor. Finally, based on a two-level rate equation model and on precise measurements of light output to current characteristics, the threshold characteristics and the direct measurement of β in a true microcavity QC laser is discussed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 427-428 |
| Number of pages | 2 |
| Journal | Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS |
| Volume | 11 |
| State | Published - 1997 |
| Externally published | Yes |
| Event | Proceedings of the 1997 Conference on Lasers and Electro-Optics, CLEO - Baltimore, MD, USA Duration: May 18 1997 → May 23 1997 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering