Tunable gain-clamped double-pass Erbium-doped fiber amplifier with a DBR lasing cavity including a fiber Bragg grating and a fiber reflection mirror

Lilin Yi; Li Zhan; Chien Hsien Taung; Qinghao Ye; Yuxing Xia

doi:10.1117/12.570906

10 January 2005 Tunable gain-clamped double-pass erbium-doped fiber amplifier with a DBR lasing cavity including a fiber Bragg grating and a fiber reflection mirror

Lilin Yi, Li Zhan, Chien Hsien Taung, Qinghao Ye, Yuxing Xia

Author Affiliations +

Proceedings Volume 5623, Passive Components and Fiber-based Devices; (2005) https://doi.org/10.1117/12.570906
Event: Asia-Pacific Optical Communications, 2004, Beijing, China

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.

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Lilin Yi, Li Zhan, Chien Hsien Taung, Qinghao Ye, and Yuxing Xia "Tunable gain-clamped double-pass erbium-doped fiber amplifier with a DBR lasing cavity including a fiber Bragg grating and a fiber reflection mirror", Proc. SPIE 5623, Passive Components and Fiber-based Devices, (10 January 2005); https://doi.org/10.1117/12.570906

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KEYWORDS

Fiber Bragg gratings

Optical amplifiers

Signal attenuation

Dense wavelength division multiplexing

Fiber amplifiers

Optical filters

Electronic filtering

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