Sign on

SAO/NASA ADS Physics Abstract Service

· Find Similar Abstracts (with default settings below)
· Table of Contents
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Prospects for solar-pumped semiconductor lasers
Authors:
Landis, Geoffrey A.
Affiliation:
AA(NASA Lewis Research Ctr)
Publication:
Proc. SPIE Vol. 2121, p. 58-65, Laser Power Beaming, Jack V. Walker; Edward E. Montgomery; Eds. (SPIE Homepage)
Publication Date:
05/1994
Origin:
SPIE
Bibliographic Code:
1994SPIE.2121...58L

Abstract

Approaches are discussed for a direct solar-pumped semiconductor laser. Efficiencies of 35% should be achievable, an order of magnitude better than the efficiency achieved by other solar- pumped lasers. The output wavelength of a semiconductor laser will be well matched to the optimum conversion efficiency of a solar cell of the same material. Solar pumped semiconductor lasers are thus an excellent candidate for space-based energy transmission. Recently several designs for such lasers have been proposed. A critical parameter is the sunlight intensity required for lasing. This threshold has been calculated to be in the range of 2500 to 10,000 times solar intensity for conventional stripe laser designs, depending on assumptions. Several approaches have been recently proposed to reduce this threshold. The calculated minimum threshold is 25 - 50 times solar concentration, and could possibly be reduced even further with use of light-trapping.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
  New!

Find Similar Abstracts:

Use: Authors
Title
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints