摘要
针对传统的LbandEDFA的工作效率低,提出了一种基于单根光纤光栅、泵浦分配、两段级联的EDFA的新结构,其中的光纤光栅用来反射无用的后向CbandASE系统地研究了泵浦比例和光纤光栅波长对增益噪声指数的影响关系最后经实验验证,得到了低噪声、高增益的Lband的EDFA其在输入信号光(1570nm)功率为-30dBm及泵浦功率为70mW时,增益为22.26dB,增益噪声指数为4.
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.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2005年第3期409-411,共3页
Acta Photonica Sinica
关键词
L-BAND
掺铒光纤放大器
噪声
增益
L-band
Erbium doped fiber amplifier (EDFA)
Noise figure
Gain
