%0 Journal Article
%T Theoretical and Experimental Investigation on Erbium-Doped Fiber Amplifiers with Long-Period Fiber Grating Filters<br>基于长周期光纤光栅滤波器的掺铒光纤放大器理论和实验研究
%A RAN Zeng-ling
%A RAO Yun-jiang
%A LUO Xiao-dong
%A <br>冉曾令
%A 饶云江
%A 罗小东
%J 光子学报
%D 2008
%I 
%X Erbium-doped fiber amplifiers (EDFAs) with low-cost long-period fiber gratings (LPFGs) fabricated by high-frequency CO2 laser pulses are investigated theoretically and experimentally. Results shows that Performances of EDFAs for both single-wavelength and multi-wavelength applications can be improved via inserting a LPFG into the erbium-doped fiber (EDF) as an ASE noise filter or a gain equalizer. Optimization of an in-line EDFA with a LPFG is also provided. The NF of such an in-line EDFA is improved by ~0.5 dB and its small-signal gain is enhanced by 7 dB, compared with that without filtering. A multi-wavelength EDFA with a gain flatness of ~1.5 dB is simply achieved via inserting a LPFG into the middle of an EDF as a gain equalizer, accompanying with a gain improvement of ~1 dB and a NF reduction of ~0.1 dB compared with the EDFA having a LPFG located after the EDF.
%K Long-period fiber grating(LPFG)
%K ASE noise filters
%K Gain equalizer
%K Erbium-doped fiber amplifiers(EDFAs)<br>长周期光纤光栅
%K 自发辐射噪声滤波器
%K 增益平坦器
%K 掺铒光纤放大器
%K Long-period
%K fiber
%K grating(LPFG)
%K ASE
%K noise
%K filters
%K Gain
%K equalizer
%K Erbium-doped
%K fiber
%K amplifiers(EDFAs)
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=9F6139E34DAA109F9C104697BF49FC39&aid=B9D6EF8A8B941219FA00B1DE229B3C25&yid=67289AFF6305E306&vid=42425781F0B1C26E&iid=E158A972A605785F&sid=08B2E838F29A693A&eid=27A3D4EE1F52A91C&journal_id=1004-4213&journal_name=光子学报&referenced_num=1&reference_num=14