基于受激布里渊散射的慢光在全光通信中具有重要的应用前景。传统的光纤作为慢光介质,具有较低的延迟效率,对光纤长度和抽运功率要求较高,而高非线性光子晶体光纤作为慢光介质应用于慢光系统,可以提高系统的延迟效率。实验选用一段70 m长的高非线性光子晶体光纤作为慢光介质,在抽运功率101 mW情况下,50 ns脉冲信号获得了33 dB的布里渊增益,脉冲延迟了30 ns,延迟效率达到了0.0046 ns/(mW·m),是普通单模光纤的13.7倍。该光纤应用于受激布里渊散射慢光系统可以有效缩短光纤长度和降低对抽运功率的要求,具有潜在的应用前景。

There are important applications for stimulated Brillouin scattering slow light in all optical communications network.The conventional optical fibers used as slow light medium have low delay efficiency,so the demands of fiber length and pump power are higher.The delay efficiency can be improved by using highly nonlinear photonic crystal fibers.The Brillouin gain of 33 dB is achieved in a 70 m highly nonlinear photonic crystal fiber under the pump power 101 mW,which results in 30 ns time delay of 50 ns signal pulses.The delay efficiency of this kind fiber is 0.0046 ns/(mW·m),which is about 13.7 times larger than the single mode fiber.The demands of fiber length and pump power are effectively reduced when this kind of fiber is used,and the fiber has a large potential use in stimulated Brillouin scattering slow light system.