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Optical Engineering

Optimization of the multiwavelength erbium-doped fiber laser in a unidirectional cavity without an isolator
Author(s): Guo-Yong Sun; Ronghui Qu; Jingxin Yang; Xiangzhao Wang
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Paper Abstract

A highly uniform multiwavelength erbium-doped fiber ring laser with an intracavity sine phase modulator is demonstrated. The flat output spectrum is achieved by optimizing the cavity structure, modulation amplitude, and frequency of the sine phase modulator. Fifteen lasing lines with wavelength spacing of 0.9 nm appear simultaneously and stably with power differences less than 2 dB and side-mode suppression ratio higher than 32 dB. In addition, the proposed cavity can support unidirectional operation without optical isolators. An output power difference of about 20 dB is realized between the counterclockwise and clockwise directions, which is almost independent of the pump power and lasing wavelengths.

Paper Details

Date Published: 1 September 2005
PDF: 4 pages
Opt. Eng. 44(9) 094204 doi: 10.1117/1.2047548
Published in: Optical Engineering Volume 44, Issue 9
Show Author Affiliations
Guo-Yong Sun, Shanghai Institute of Optics and Fine Mechanics (China)
Ronghui Qu, Shanghai Institute of Optics and Fine Mechanics (China)
Jingxin Yang, Shanghai Institute of Optics and Fine Mechanics (China)
Xiangzhao Wang, Shanghai Institute of Optics and Fine Mechanics (China)


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