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Proceedings Paper

Investigation on gain-clamped characteristics of ring cavity L-band EDFA
Author(s): Hongwei Yan; Yubin Guo; Bing Bai; Tianshu Wang; Jiayu Huo
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Paper Abstract

A novel gain-clamped Long wavelength band erbium doped fiber amplifier (L-band EDFA) based on ring erbium-doped fiber laser cavity was demonstrated. By using a fiber Bragg grating (FBG) at the output end of the amplifier, a portion of forward conventional band (C-band) amplified spontaneous emission (ASE) was reflected back into the system, this new design provided a good gain clamping and decreased noise effectively. It used 1480nm laser diode (LD) to pump high Er3+ −concentration erbium-doped fiber for higher efficiency and lower noise figure (NF). The gain was clamped at 17.5dB with a variation of 0.3 dB from input signal power of -30dBm to -12dBm for a pump power of 180mW. By adjusting the intra-cavity loss, the gain reached 19.78dB with inputting small signal and NF below 5dB was obtained. At the longer wavelength (1614nm) of L-band 9.2dB gain was obtained.

Paper Details

Date Published: 27 November 2007
PDF: 7 pages
Proc. SPIE 6781, Passive Components and Fiber-based Devices IV, 67814F (27 November 2007); doi: 10.1117/12.743552
Show Author Affiliations
Hongwei Yan, Jilin Univ. (China)
Yubin Guo, Jilin Univ. (China)
Bing Bai, Jilin Univ. (China)
Tianshu Wang, Jilin Univ. (China)
Jiayu Huo, Jilin Univ. (China)


Published in SPIE Proceedings Vol. 6781:
Passive Components and Fiber-based Devices IV
Ming-Jun Li; Jianping Chen; Satoki Kawanishi; Ian H. White, Editor(s)

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