Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/36196
Title: Highly efficient ytterbium-doped phosphosilicate fiber lasers operating below 1020nm
Authors: Gu, GC
Liu, ZY
Kong, FT
Tam, H 
Shori, RK
Dong, L
Issue Date: 2015
Publisher: Optical Society of America
Source: Optics express, 2015, v. 23, no. 14, p. 17693-17700 How to cite?
Journal: Optics express 
Abstract: Highly-efficient high-power fiber lasers operating at wavelength below 1020nm are critical for tandem-pumping in >10kW fiber lasers to provide high pump brightness and low thermal loading. Using an ytterbium-doped-phosphosilicate double-clad leakage-channel fiber with similar to 50 mu m core and similar to 420 mu m cladding, we have achieved similar to 70% optical-to-optical efficiency at 1018nm. The much larger cladding than those in previous reports demonstrates the much lower required pump brightness, a key for efficient kW operation. The demonstrated 1018nm fiber laser has ASE suppression of similar to 41dB. This is higher than previous reports and further demonstrates the advantages of the fiber used. Limiting factors to efficiency are also systematically studied.
URI: http://hdl.handle.net/10397/36196
EISSN: 1094-4087
DOI: 10.1364/OE.23.017693
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