High-efficiency pulsed laser transmitters for deep-space communication

Autor:	Carlos Esproles, Hamid Hemmati, Malcolm W. Wright, Abhijit Biswas
Rok vydání:	2000
Předmět:	Engineering business.industry Energy conversion efficiency Physics::Optics Laser Q-switching law.invention Semiconductor laser theory Optics law Fiber laser Diode-pumped solid-state laser Radiator (engine cooling) Optoelectronics Quantum efficiency business
Zdroj:	SPIE Proceedings.
ISSN:	0277-786X
DOI:	10.1117/12.384309
Popis:	Highly efficient laser sources are required for deep space optical telecommunication. This paper investigates the efficiency components for pulsed diode pumped solid state laser transmitters and determines the overall wall-plug efficiency applicable to a space-borne system. Thermal control of the pump diodes is critical to achieving optimum photon efficiency. Hence, a thermal model involving either a thermo-electric cooler or loop heat pipes is applied to the efficiency calculations. The electro-optical conversion efficiency for an optimized bulk design is expected to be up to 28% with the overall wall-plug efficiency being in the 12 - 16% range depending on the radiator temperature. A fiber based master-oscillator power-amplifier design is also investigated with passively cooled pumped diodes and promises high efficiency operation. Preliminary results from an evaluation model are also discussed.© (2000) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Databáze:	OpenAIRE
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