%0 Journal Article
%T Experimental Study of an L-band Erbium Doped Fiber Amplifier With Low-noise and High Gain<br>低噪声、高增益的L -band EDFA的实验研究
%A Centre for Optical
%A Electromagnetic Research
%A State Key Laboratory of Modern Optical Instrumentation
%A Joint Laboratory of Optical Communications of Zhejiang University
%A Zhejiang University
%A Hangzhou
%A <br>秦山
%A 强则煊
%A 何赛灵
%J 光子学报
%D 2005
%I 
%X A new two-stage L-band erbium doped fiber amplifier (EDFA) structure with a single fiber grating is introduced to solve the problem of poor power conversion efficiency of a conventional L-band EDFA. A mid-way isolator is used in the structure to improve the noise figure. The fiber grating is used to reflect the wasted C-band backward amplified spontaneous emission (ASE). The influence of the pump power ratio and the Bragg wavelength to the characteristics of this EDFA is studied experimentally. For such an EDFA structure with a pump power of 70 mW, 22.26 dB gain and 4.96 dB noise figure is obtained for a 1570 nm signal with an input power of-30 dBm.
%K L-band
%K Erbium doped fiber amplifier (EDFA)
%K Noise figure
%K Gain<br>L-band
%K 掺铒光纤放大器
%K 噪声
%K 增益
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=9F6139E34DAA109F9C104697BF49FC39&aid=E5A8B3A0A8B52D10&yid=2DD7160C83D0ACED&vid=339D79302DF62549&iid=38B194292C032A66&sid=0493D643315CD829&eid=34D9E20AD82A0D72&journal_id=1004-4213&journal_name=光子学报&referenced_num=3&reference_num=15