高非线性微结构光纤中基于受激布里渊散射的慢光延迟

Slow light based on stimulated Brillouin scattering in microstructured fiber

全光连续可调的慢光技术在全光网络和光信息处理等领域具有重要的应用前景.利用自行设计并拉制的高非线性微结构光纤,实验研究了基于受激布里渊散射的可调谐慢光延迟.采用单抽运光和单级延迟方案,当抽运光功率为162.6 mW时,在长度为120 m的高非线性微结构光纤中获得了最大76 ns的延迟量,相当于0.76个脉冲宽度.通过调节抽运光功率的大小,可以实现对慢光延迟量的可调谐.该慢光延迟方案具有延迟量大、全光可调谐及与现有光通信系统兼容等优势.

All-optical tunable slow light technology has promising applications in all-optical network and optical information process. Tun- able slow light based on stimulated Brillouin scattering is experimentally investigated, using highly nonlinear microstructured fiber which is designed and drawn by ourselves. The experiment setup is composed of single pump and a single-stage delay. When the pump power reaches 162.6 mW, a maximum delay of 76 ns, equal to 0.76 pulse width, is achieved in the highly nonlinear microstruc- tured fiber of 120 m in length. In addition, by adjusting the pump power, the tunable slow light can be realized. This scheme of slow light has advantages such as large delay, being all-optical tunable and compatible with optical communications systems.