Investigation on gain-clamped characteristics of ring cavity L-band EDFA

Hongwei Yan; Yubin Guo; Bing Bai; Tianshu Wang; Jiayu Huo

doi:10.1117/12.743552

27 November 2007 Investigation on gain-clamped characteristics of ring cavity L-band EDFA

Hongwei Yan, Yubin Guo, Bing Bai, Tianshu Wang, Jiayu Huo

Proceedings Volume 6781, Passive Components and Fiber-based Devices IV; 67814F (2007) https://doi.org/10.1117/12.743552
Event: Asia-Pacific Optical Communications, 2007, Wuhan, China

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.

Citation Download Citation

Hongwei Yan, Yubin Guo, Bing Bai, Tianshu Wang, and Jiayu Huo "Investigation on gain-clamped characteristics of ring cavity L-band EDFA", Proc. SPIE 6781, Passive Components and Fiber-based Devices IV, 67814F (27 November 2007); https://doi.org/10.1117/12.743552

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