光谱学与光谱分析 |
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Research on Key Technologies of All Fiber Optic Fourier Transform Spectrometer |
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, Hefei230031, China |
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Abstract 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.
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Received: 2008-05-06
Accepted: 2008-08-12
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Corresponding Authors:
ZHU Ling
E-mail: zhul@aiofm.ac.cn
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