Low-noise front-end electronics for detection of intermediate-frequency weak light signals

Cunbao Lin; Shuhua Yan; Zhiguang Du; Chunhua Wei; Guochao Wang

doi:10.1117/12.2180825

6 March 2015 Low-noise front-end electronics for detection of intermediate-frequency weak light signals

Cunbao Lin, Shuhua Yan, Zhiguang Du, Chunhua Wei, Guochao Wang

Proceedings Volume 9446, Ninth International Symposium on Precision Engineering Measurement and Instrumentation; 94461M (2015) https://doi.org/10.1117/12.2180825
Event: International Symposium on Precision Engineering Measurement and Instrumentation, 2014, Changsha/Zhangjiajie, China

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.

Citation Download Citation

Cunbao Lin, Shuhua Yan, Zhiguang Du, Chunhua Wei, and Guochao Wang "Low-noise front-end electronics for detection of intermediate-frequency weak light signals", Proc. SPIE 9446, Ninth International Symposium on Precision Engineering Measurement and Instrumentation, 94461M (6 March 2015); https://doi.org/10.1117/12.2180825

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