NDLI: Power Scaling of Ytterbium-doped Fiber Superfluorescent Sources

Content Provider	IEEE Xplore Digital Library
Author	Pu Wang Sahu, J.K. Clarkson, W.A.
Copyright Year	1995
Abstract	Power scaling of ytterbium-doped fiber superfluorescent sources based on single-stage and two-stage cladding-pumped fiber configurations is reported. For the single-stage configuration, a novel fiber-end termination scheme was employed to suppress laser oscillation in combination with a simple all-fiber scheme for achieving a predominantly single-ended output. The fiber was cladding-pumped by a diode stack at 976 nm and yielded ~62 W of single-ended amplified spontaneous emission output for 119 W of launched pump power, limited by the onset of parasitic lasing. At pump powers in excess of 40 W, the slope efficiency with respect to the launched pump power was 67%. The emission spectrum spanned the wavelength range from 1030 to 1100 nm and the bandwidth (FWHM) was 12 nm. Scaling to higher power levels was demonstrated using a two-stage cladding-pumped fiber configuration comprising of a low-power fiber superfluorescent seed source and a high-power amplifier. The two-stage source yielded 122 W of amplified spontaneous emission output (limited by available pump power) in a beam with M² ap 2.1. The slope efficiency for the amplifier with respect to the launched pump power was 77%. The prospects for further improvement in performance and output power are considered.
Sponsorship	IEEE Lasers and Electro-Optics Society
Starting Page	580
Ending Page	587
Page Count	8
File Size	339786
File Format	PDF
ISSN	1077260X
Volume Number	13
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-05-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Spontaneous emission Power amplifiers Termination of employment Fiber lasers Pump lasers Diodes Bandwidth High power amplifiers Laser excitation Power generation superfluorescence Amplified spontaneous emission (ASE) cladding-pumping fiber amplifiers rare-earth-doped optical fibers
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering

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