The location accuracy in the distributed sensor based on Brillouin loss due to Brillouin slow light (Invited)
The impact of Brillouin slow light on distributed Brillouin fiber sensors is studied. We demonstrate Brillouin slow light for a 1.2 ns pulse with peak power from 3.3 to 56.2 mW at the depletion of the pump power from 1.3 mW to 83.2 mW in conventional optical fibers (SMF-28). Our experimental results show that when the depletion of the pump power is not negligible, for a given pump power the Brillouin gain and delay time of a pulse decrease when the pulse peak power increases in a long length (10 km) sensing fiber. The strong depletion of the pump beam resulting from the strong interaction between pump and probe in the fiber provides accurate local temperature and strain information at high spatial resolution. It is found that pump depletion mitigates significantly the delay: the maximum delay induced at resonance is only a fraction of the spatial resolution, which means pulse width for the spatial resolution is still valid definition when Brillouin slow light is included.
Distributed Brillouin senso slow light,location accuracy depletion
Xiaoyi Bao Lufan Zou Fabien Ravet Liang Chen
Fiber Optics Group, University of Ottawa, Ottawa, ON, Canada, K1N 6N5
国际会议
成都
英文
387-390
2006-09-18（万方平台首次上网日期，不代表论文的发表时间）