Hybrid distributed Raman amplification combining random fiber laser based 2nd-order and low-noise LD based 1st-order pumping

被引：73
作者：
Jia, Xin-Hong [1 ,2 ]
Rao, Yun-Jiang [1 ]
Yuan, Cheng-Xu [1 ]
Li, Jin [1 ]
Yan, Xiao-Dong [1 ]
Wang, Zi-Nan [1 ]
Zhang, Wei-Li [1 ]
Wu, Han [1 ]
Zhu, Ye-Yu [1 ]
Peng, Fei [1 ]
机构：
[1] Univ Elect Sci & Technol China, Educ Minist China, Key Lab Opt Fiber Sensing & Commun, Chengdu 611731, Sichuan, Peoples R China
[2] Sichuan Normal Univ, Sch Phys & Elect Engn, Chengdu 610068, Sichuan, Peoples R China
来源：
OPTICS EXPRESS | 2013年 / 21卷 / 21期
关键词：
FEEDBACK; BOTDA; OPTIMIZATION; SENSORS;
D O I：
10.1364/OE.21.024611
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A configuration of hybrid distributed Raman amplification (H-DRA), that is formed by incorporating a random fiber laser (RFL) based 2nd-order pump and a low-noise laser-diode (LD) based 1st-order pump, is proposed in this paper. In comparison to conventional bi-directional 1st-order DRA, the effective noise figure (ENF) is found to be lower by amount of 0 to 4dB due to the RFL-based 2nd-order pump, depending on the on-off gain, while the low-noise 1st-order Raman pump is used for compensating the worsened signal-to-noise ratio (SNR) in the vicinity towards the far end of the fiber and avoiding the potential nonlinear impact induced by excess injection of pump power and suppressing the pump-signal relative intensity noise (RIN) transfer. As a result, the gain distribution can be optimized along ultra-long fiber link, due to combination of the 2nd-order RFL and low-noise 1st-order pumping, making the transmission distance be extended significantly. We utilized such a configuration to achieve ultra-long-distance distributed sensing based on Brillouin optical time-domain analysis (BOTDA). A repeater-less sensing distance record of up to 154.4km with 5m spatial resolution and similar to +/- 1.4 degrees C temperature uncertainty is successfully demonstrated. (C)2013 Optical Society of America
引用
收藏
页码：24611 / 24619
页数：9
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