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Proceedings Paper

Tunable gain-clamped double-pass Erbium-doped fiber amplifier with a DBR lasing cavity including a fiber Bragg grating and a fiber reflection mirror
Author(s): Lilin Yi; Li Zhan; Chien Hsien Taung; Qinghao Ye; Yuxing Xia
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Paper Abstract

A tunable, gain-clamped (GC) double-pass Erbium-doped fiber amplifier (EDFA) using only one fiber Bragg grating (FBG) has been demonstrated, which solves the problem existing the conventional GC-EDFA using two FBGs, in which the clamped-gain is very difficult to be tuned. In the new GC-EDFA, the lasing oscillation for clamping the gain is produced between a FBG and a fiber reflection mirror, and a variable optical attenuator (VOA) is used to change the loss of the laser, which is filtered solely from a narrowband filter for tuning the clamped-gain, however it does not change the signal power directly. Meanwhile, the double-pass configuration enhances efficiently the gain, therefore, compared with the single-pass configuration, the maximum possible input signal power for gain-clamping is greatly extended. Furthermore, the FBG can depress the strong backward amplification spontaneous emission in double-pass configuration, so it can reduce the noise figure a certain extent. Finally, a gain-tunable GC-EDFA with a wide dynamic input power range is demonstrated.

Paper Details

Date Published: 10 January 2005
PDF: 7 pages
Proc. SPIE 5623, Passive Components and Fiber-based Devices, (10 January 2005); doi: 10.1117/12.570906
Show Author Affiliations
Lilin Yi, Shanghai Jiao Tong Univ. (China)
Li Zhan, Shanghai Jiao Tong Univ. (China)
Chien Hsien Taung, Shanghai Jiao Tong Univ. (China)
Qinghao Ye, Shanghai Jiao Tong Univ. (China)
Yuxing Xia, Shanghai Jiao Tong Univ. (China)

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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