Large Raman gain and nonlinear phase shifts in high-purity As 2 Se 3 chalcogenide fibers
Large Raman gain and nonlinear phase shifts in high-purity As 2 Se 3 chalcogenide fibers
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DOI：
10.1364/josab.21.001146
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发表时间：
2004-06
影响因子：
1.9
通讯作者：
R. Slusher;G. Lenz;J. Hodelin;J. Sanghera;L. Shaw;I. Aggarwal
中科院分区：
文献类型：
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作者：
R. Slusher;G. Lenz;J. Hodelin;J. Sanghera;L. Shaw;I. Aggarwal
实验研究了1.55 μm附近高纯As_2Se_3光纤的三阶克尔非线性和拉曼增益。克尔非线性系数比石英光纤高近1000倍。在脉冲模式下，在峰值脉冲功率约为3 W，长度仅为85 cm的光纤中测得了1.2-π rad的非线性相移。然而，对于π附近的非线性相移，存在接近20%的非线性损耗。通过使用连续光泵浦，测得了接近二氧化硅的800倍的大拉曼增益。在cw的情况下，在光纤的出射面处存在由驻波形成的折射率光栅形式的损耗。离散拉曼放大器和光再生器作为可能的应用进行了讨论。
Third-order Kerr nonlinearities and Raman gain are studied experimentally in high-purity As2Se3 optical fibers for wavelengths near 1.55 μm. Kerr nonlinear coefficients are measured to be nearly 1000 times higher than those for silica fibers. In pulsed mode, nonlinear phase shifts near 1.2-π rad are measured in fibers only 85 cm long with peak pulse powers near 3 W. However, there are nonlinear losses near 20% for nonlinear phase shifts near π. By use of a cw optical pump, large Raman gains nearly 800 times that of silica were measured. In the cw case there were losses in the form of index gratings formed from standing waves at the exit face of the fiber. Discrete Raman amplifiers and optical regenerators are discussed as possible applications.