Self-Cooled Semiconductor Lasers for Cryogenic Applications
Abstract
Self-Cooled Semiconductor LasWaste heat generation is a generic problem in laser systems. Reduction of thermal loading is of crucial importance in high-power and cryogenic laser applications. In radiation-balanced lasers, the anti-Stokes spontaneous emission within the laser medium is employed to balance the heat generated by the Stokesshifted stimulated emission. The same process is also used in laser cooling, where external laser light is used for optical pumping of a refrigerated sample. We propose a new scheme for self-cooled semiconductor lasers, where the cooling effect is achieved through efficient anti-Stokes spontaneous emission from colloidal quantum dots embedded into the laser structure and excited by the laser emission. The physical mechanism is similar to that used in the laser cooling and requires colloidal quantum dots with very efficient anti-Stokes emission when excited at the laser emission wavelength. Different 1.55- ?m semiconductor material systems will be explored to determine the one that provides the best cryogenic laser performance. Various designs of the edge-emitting laser will be explored to find the most efficient way for spontaneous emission extraction from the laser structure in order to prevent reabsorption of the spontaneous emission and reheating of the laser.ers for Cryogenic Applications
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 29, 2017
- Source ID
- N000141712975
Entities
People
- Marek Osinski
Organizations
- Office of Naval Research
- United States Navy
- University of New Mexico