自准直干涉仪测光纤非线性克尔系数的误差分析

• 作 者: 刘兵 余重秀 吉华 忻向军 曾军英
• 机 构: 北京邮电大学电子工程学院,北京邮电大学电子工程学院,北京邮电大学电子工程学院,北京邮电大学电子工程学院,北京邮电大学电子工程学院 北京100876,青岛大学,山东青岛266071,北京100876,北
• 出 处: 光学技术
• 发表日期: 2007年03期
• 关键词: 自准直干涉仪 光纤科尔系数 光纤测量 自相位调制 相移

由M-Z干涉仪组成自准直干涉装置是一种抗干扰很强的干涉法测光纤非线性科尔系数γ的装置。由于测试脉冲强度受光纤的衰减和耦合器的分流,输入段和输出段脉冲强度不一样,势必要引入系统相移扰动,造成测试相移并非完全是测试光纤SPM效应引入的相移,对准确测量光纤非线性科尔系数γ值形成误差。理论分析了这种扰动的形成机理,引入扰动相移误差量。模拟分析了影响相移误差量的参数,优化这些参数,并且找到最优参数值,使相移误差量最小,且不受输入脉冲强度变化的影响。大大地改善了该系统的性能。最后试验测试了SMF光纤,和已有测试方法比较,波动范围明显减小。

By M-Z interferometer composed of self-collimating interference device is a strong anti-interference interferometer method for measuring fiber nonlinear Coefficient γ device. Because the test pulse intensity is attenuated by the fiber and the shunt of the coupler, the pulse intensities of the input section and the output section are different, it is bound to introduce the system phase shift disturbance, which causes the phase shift of the test not completely caused by the SPM effect of the test fiber. Measuring fiber nonlinear Coefficient γ value error. The formation mechanism of this disturbance is analyzed theoretically, and the amount of disturbance phase shift error is introduced. The parameters influencing the amount of phase shift error are simulated and analyzed, and the optimal parameters are optimized and the amount of phase shift error is minimized without being affected by the change of input pulse intensity. Greatly improve the performance of the system. The final test of SMF fiber, and the existing test methods, the fluctuation range was significantly reduced.