PMID- 24150305
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20140613
LR  - 20181023
IS  - 1094-4087 (Electronic)
IS  - 1094-4087 (Linking)
VI  - 21
IP  - 21
DP  - 2013 Oct 21
TI  - Hybrid distributed Raman amplification combining random fiber laser based 
      2nd-order and low-noise LD based 1st-order pumping.
PG  - 24611-9
LID - 10.1364/OE.21.024611 [doi]
AB  - 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 4 dB 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 154.4 km with 5 m spatial resolution and ~ +/- 1.4  degrees C 
      temperature uncertainty is successfully demonstrated.
FAU - Jia, Xin-Hong
AU  - Jia XH
FAU - Rao, Yun-Jiang
AU  - Rao YJ
FAU - Yuan, Cheng-Xu
AU  - Yuan CX
FAU - Li, Jin
AU  - Li J
FAU - Yan, Xiao-Dong
AU  - Yan XD
FAU - Wang, Zi-Nan
AU  - Wang ZN
FAU - Zhang, Wei-Li
AU  - Zhang WL
FAU - Wu, Han
AU  - Wu H
FAU - Zhu, Ye-Yu
AU  - Zhu YY
FAU - Peng, Fei
AU  - Peng F
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - Opt Express
JT  - Optics express
JID - 101137103
EDAT- 2013/10/24 06:00
MHDA- 2013/10/24 06:01
CRDT- 2013/10/24 06:00
PHST- 2013/10/24 06:00 [entrez]
PHST- 2013/10/24 06:00 [pubmed]
PHST- 2013/10/24 06:01 [medline]
AID - 268758 [pii]
AID - 10.1364/OE.21.024611 [doi]
PST - ppublish
SO  - Opt Express. 2013 Oct 21;21(21):24611-9. doi: 10.1364/OE.21.024611.