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Proceedings Paper

A tunable multiwavelength fiber laser source with an elliptical-core fiber Sagnac loop filter
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Paper Abstract

A novel 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 multi-frequency lasing output at room temperature. In experiment, by changing the setting of the polarization controller (PC2), multiple frequency lasing lines with different wavelength spacing have been obtained. By applying some pressure to the PM-EDF, continuously tunable multiwavelength lasing output is achieved. Experimental results have shown several stable output lasing wavelengths with high extinction ratio at room temperature.

Paper Details

Date Published: 10 January 2005
PDF: 8 pages
Proc. SPIE 5623, Passive Components and Fiber-based Devices, (10 January 2005); doi: 10.1117/12.574359
Show Author Affiliations
Duan Liu, Nanyang Technological Univ. (Singapore)
Nam Quoc Ngo, Nanyang Technological Univ. (Singapore)
Xin Yong Dong, Nanyang Technological Univ. (Singapore)
Kenneth T. V. Grattan, City Univ. London (United Kingdom)
Tong Sun, City Univ. London (United Kingdom)
Le Nguyen Binh, Monash Univ. (Australia)
Swee Chuan Tjin, Nanyang Technological Univ. (Singapore)
Song Yang Li, Nanyang Technological Univ. (Singapore)

Published in SPIE Proceedings Vol. 5623:
Passive Components and Fiber-based Devices
Yan Sun; Shuisheng Jian; Sang Bae Lee; Katsunari Okamoto, Editor(s)

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