利用受激布里渊散射在光纤中实现光存储

利用有限差分法在慢变包络近似下求解了耦合波方程组,并从理论上实现了短光脉冲的存储。研究了数据脉冲的读出效率随声子寿命、布里渊增益系数、数据脉冲强度和控制脉冲强度的变化规律。结果显示:在长声子寿命的条件下,可以获得高的读出效率和长的存储时间,而布里渊增益系数和数据脉冲强度对读出效率没有影响;增大布里渊增益系数可以降低所需控制脉冲的强度。这种方法对短脉冲可以实现有效存储,而对长脉冲不能实现存储。

Stored light in an optical fiber based on stimulated Brillouin scattering

Under the slowly-varying-envelope approximation, the three coupled-wave equations were resolved and the storage of optical pulses was demonstrated theoretically. The variation of readout efficiency of date pulses versus acoustic lifetime, Brillouin gain coefficient, date pulse intensity and control pulse intensity were studied. The results show that, better readout efficiency and longer storage time of date pulses can be obtained with longer acoustic lifetime. Both Brillouin gain coefficient and the intensity of date pulses have no effect on readout efficiency. However, for a given readout efficiency, the intensity of control pulses decreases with increasing the Brillouin gain coefficient. Compared with long pulses, this optical storage method is more applicable for short ones.