Optimization of the multiwavelength erbium-doped fiber laser in a unidirectional cavity without an isolator

Guo-Yong Sun; Ronghui Qu; Jingxin Yang; Xiangzhao Wang

doi:10.1117/1.2047548

1 September 2005 Optimization of the multiwavelength erbium-doped fiber laser in a unidirectional cavity without an isolator

Guo-Yong Sun, Ronghui Qu, Jingxin Yang, Xiangzhao Wang

Author Affiliations +

Optical Engineering, Vol. 44, Issue 9, 094204 (September 2005). https://doi.org/10.1117/1.2047548

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.

©(2005) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Guo-Yong Sun, Ronghui Qu, Jingxin Yang, and Xiangzhao Wang "Optimization of the multiwavelength erbium-doped fiber laser in a unidirectional cavity without an isolator," Optical Engineering 44(9), 094204 (1 September 2005). https://doi.org/10.1117/1.2047548

Published: 1 September 2005

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KEYWORDS

Modulation

Fiber lasers

Modulators

Optical isolators

Phase shift keying

Ferroelectric materials

Optical filters

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