提出了一种基于超高分辨率光谱分析实现周期性光信号频域中相位分布的测量方法.在已测得待测信号高分辨率光谱的情况下,利用马赫泽德调制器载波抑制效应调制激光器产生双泵浦,激发高非线性光纤中的受激布里渊散射效应形成有源双滤波器.用泵浦激光器在测量波长范围内进行连续扫描,得到包含待测信号相位信息的拍频信号,经数据采集和处理后得到待测信号频域上的相对相位信息.实验给出了速率为5Gb/s,字长为31bit的周期性光信号在频域上的相对相位分布信息,证明了这种有源双滤波器的频率响应特性可以满足相位测试的需要.

A method to measure the relative phase distribution of the signal with repetitive pattern was proposed based on ultra-high resolution optical spectrum analysis.After achieved the optical spectrum,the pump with carrier suppression of the Mach-Zehnder modulator was modulated to create a dual-pumping stimulated Brillouin scattering,as dual-channel active filter.By continuously scanning through the wavelength range under test,data acquisition and processing,the relative phase distribution of modulated optical signal was got.The frequency response results show that the dual-channel filter is suitable for phase measuring,and the relative phase distribution in frequency domain of a 5 Gb/s,31 bits optical signal with repetitive pattern modulated using this technique was obtained.