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Optical Engineering

Spacing-tunable multiwavelength fiber laser source using a Sagnac loop filter
Author(s): Nam Quoc Ngo; Duan Liu; Xinyong Dong; Le Nguyen Binh; Swee Chuan Tjin; Song Yang Li
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Paper Abstract

A novel spacing-tunable multiwavelength erbium-doped fiber laser source based on a Sagnac loop filter is proposed and experimentally demonstrated. The filter, which is coupled together with the laser cavity, consists of a normal 3-dB fiber coupler, a polarization controller (PC1), and a segment of high-birefringence (Hi-Bi) fiber. The active gain medium, which is a polarization-maintaining erbium-doped fiber (PM-EDF) with an elliptical core, leads to possible multifrequency lasing output at room temperature. In the experiment, by changing the setting of the polarization controller (PC2), multiple-frequency lasing lines with different wavelength spacing are obtained. Experimental results show several stable output lasing wavelengths with high extinction ratios at room temperature.

Paper Details

Date Published: 1 January 2005
PDF: 5 pages
Opt. Eng. 44(1) 014202 doi: 10.1117/1.1828473
Published in: Optical Engineering Volume 44, Issue 1
Show Author Affiliations
Nam Quoc Ngo, Nanyang Technological Univ. (Singapore)
Duan Liu, Nanyang Technological Univ. (Singapore)
Xinyong Dong, Nanyang Technological Univ. (Singapore)
Le Nguyen Binh, Monash Univ. (Australia)
Swee Chuan Tjin, Nanyang Technological Univ. (Singapore)
Song Yang Li, Nanyang Technological Univ. (Singapore)

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