Thermodynamics of daylight-pumped lasers
Abstract
The problem of very-low-threshold, daylight-pumped lasers is considered in a general thermodynamic framework. It is calculated that the requirements to reach threshold are that the Stokes shift of such a laser be greater than 13.3 kT and the absorption ratio of the pump/emission band and the geometrical aspect ratio both be greater than exp(13.3). Luminescent material systems that might be able to satisfy these rigid requirements are described.
- Publication:
-
Optics Letters
- Pub Date:
- May 1983
- DOI:
- 10.1364/OL.8.000271
- Bibcode:
- 1983OptL....8..271R
- Keywords:
-
- Lasing;
- Optical Pumping;
- Stokes Law Of Radiation;
- Thermodynamics;
- Absorption Spectra;
- Aspect Ratio;
- Entropy;
- Luminescence;
- Lasers and Masers;
- PUMPING;
- LASERS