Analysis the processing algorithm for the frequency measurement variance of the acousto-optic spectrum analyzer

Qi-rui He; Lu Gan; Ying Zhou; Chun-ming Gao; Xi-ren Zhang

doi:10.1117/12.2193254

7 August 2015 Analysis the processing algorithm for the frequency measurement variance of the acousto-optic spectrum analyzer

Qi-rui He, Lu Gan, Ying Zhou, Chun-ming Gao, Xi-ren Zhang

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Proceedings Volume 9623, 2015 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems; 962315 (2015) https://doi.org/10.1117/12.2193254
Event: International Conference on Optical Instruments and Technology 2015, 2015, Beijing, China

Abstract

When the acousto-optic device worked on the Bragg model, the non-liner affected the diffraction beam. There were some errors between the diffraction beam deflection peak position and the input signal’s frequency, which reduced the frequency measure accuracy of the acousto-optic spectrum analyzer. Under the existing optical experimental platform, we eliminated the CCD background noise by reducing the threshold firstly, and then we processed the data by four methods, the peak value method, the Gaussian fitting method, the squared cancroids method and the Hilbert transform method. The least frequency measure variance is 31.8 KHz², the data processed by the Gaussian fitting method. It provides theoretical support for reducing the frequency measurement variance of acousto-optic spectrum analyzer.

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Qi-rui He, Lu Gan, Ying Zhou, Chun-ming Gao, and Xi-ren Zhang "Analysis the processing algorithm for the frequency measurement variance of the acousto-optic spectrum analyzer", Proc. SPIE 9623, 2015 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 962315 (7 August 2015); https://doi.org/10.1117/12.2193254

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KEYWORDS

Charge-coupled devices

Acousto-optics

Diffraction

Spectrum analysis

Data processing

Fourier transforms

Interference (communication)

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