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Proceedings Paper

Low-noise front-end electronics for detection of intermediate-frequency weak light signals
Author(s): Cunbao Lin; Shuhua Yan; Zhiguang Du; Chunhua Wei; Guochao Wang
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Paper Abstract

A novel low-noise front-end electronics was proposed for detection of light signals with intensity about 10 μW and frequency above 2.7 MHz. The direct current (DC) power supply, pre-amplifier and main-amplifier were first designed, simulated and then realized. Small-size components were used to make the power supply small, and the pre-amplifier and main-amplifier were the least capacitors to avoid the phase shift of the signals. The performance of the developed front-end electronics was verified in cross-grating diffraction experiments. The results indicated that the output peak-topeak noise of the ±5 V DC power supply was about 2 mV, and the total output current was 1.25 A. The signal-to-noise ratio (SNR) of the output signal of the pre-amplifier was about 50 dB, and it increased to nearly 60 dB after the mainamplifier, which means this front-end electronics was especially suitable for using in the phase-sensitive and integrated precision measurement systems.

Paper Details

Date Published: 6 March 2015
PDF: 8 pages
Proc. SPIE 9446, Ninth International Symposium on Precision Engineering Measurement and Instrumentation, 94461M (6 March 2015); doi: 10.1117/12.2180825
Show Author Affiliations
Cunbao Lin, National Univ. of Defense Technology (China)
Shuhua Yan, National Univ. of Defense Technology (China)
Zhiguang Du, National Univ. of Defense Technology (China)
Chunhua Wei, National Univ. of Defense Technology (China)
Guochao Wang, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 9446:
Ninth International Symposium on Precision Engineering Measurement and Instrumentation
Junning Cui; Jiubin Tan; Xianfang Wen, Editor(s)

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