Design and realization of a weak signal acquisition system for optical spectrum analysis

Ming Yu; Hui Lin; Xin Wei

doi:10.1117/12.2197012

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6 July 2015 Design and realization of a weak signal acquisition system for optical spectrum analysis

Ming Yu, Hui Lin, Xin Wei

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Proceedings Volume 9631, Seventh International Conference on Digital Image Processing (ICDIP 2015); 963122 (2015) https://doi.org/10.1117/12.2197012
Event: Seventh International Conference on Digital Image Processing (ICDIP15), 2015, Los Angeles, United States

Abstract

A weak signal processing system for spectrum analyzing using low-noise isolation and amplification and low-pass Filter (LPF) methods is developed. In order to extract the spectrum signals from the external disturbance as well as regenerate the detected results dynamically, a method of synchronized isolation and amplification is used to amplify the weak signals exponentially as well as to isolate the noise of random frequency by electromagnetic induction technology, and a LPF is designed to keep the output signals stable. What’s more, an interface based on MFC single document view is programmed to display and save the scanned spectrum diagram. As a result, more than 1.5 million times of amplification, less than 9nAof current drift and a cut-off frequency of 10Hzisequipped for the system.

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Ming Yu, Hui Lin, and Xin Wei "Design and realization of a weak signal acquisition system for optical spectrum analysis", Proc. SPIE 9631, Seventh International Conference on Digital Image Processing (ICDIP 2015), 963122 (6 July 2015); https://doi.org/10.1117/12.2197012

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