Wang An, Zhu Ling, Zhang Long, Liu Yong, Zhu Zhen, Li Zhi-Gang, Wu Jian-Dong, Fan Yan-Ping
Anhui Provincial Key Laboratory of Photonic Devices and Materals, Lab of Fiber and Optoelectronics, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2009 Jul;29(7):1777-80.
A noval all fiber optic Fourier transform spectrometer based on single mode fiber Mach-Zehnder interferometer is reported. The authors designed a piezoelectric optical phase modulator with two centimeter scan scale, which was used to replace the moving mirror of traditonal Fourier transform spectrometer. The 1 310 nm DFB laser was used as reference light source to make equal interval sampling of test light source's interferogram, and to eliminate errors of nonlinear modulation. Through making the inverse Fourier transform to test light source's interferogram, the authors obtained the spectrum of test source. The spectrum of ASE broadband light source was measured by FFTS system, and the experiment result agrees with that tested by grating spectrometer. Finally, the authors utilized fiber grating as sample to measure the resolution of FFTS system, and the spectral resolution is 0.78 cm(-1).
报道了一种基于单模光纤马赫曾德尔干涉仪的新型全光纤傅里叶变换光谱仪。作者设计了一种扫描范围为两厘米的压电光学相位调制器，用于取代传统傅里叶变换光谱仪中的移动镜。采用1310nm分布反馈（DFB）激光器作为参考光源，对测试光源的干涉图进行等间隔采样，以消除非线性调制误差。通过对测试光源的干涉图进行傅里叶逆变换，得到了测试光源的光谱。利用该全光纤傅里叶变换光谱（FFTS）系统测量了放大自发辐射（ASE）宽带光源的光谱，实验结果与光栅光谱仪的测试结果一致。最后，作者以光纤光栅为样品测量了FFTS系统的分辨率，光谱分辨率为0.78cm-1。
