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Proceedings Paper

A single channel input virtual dual-phase lock-in amplifier
Author(s): Zhongjian Gao; Hua Zheng; Lianhuang Li; Fang Chen; Fuyuan Guo
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Paper Abstract

In this article, it presents a suit of single channel input virtual Dual-Phase Lock-in Amplifier (DPLIA) that is constructed by a personal computer sound card and the LabVIEW software. The virtual DPLIA is low cost and convenient to implement. The implemented DPLIA could enhance the noise tolerance capability and lower the LOD of the optical signal detection system. A primary benefit of this instrument is it only needs one input channel; two internal reference signals of the digital PLL are generated in the LabVIEW software. It is easy to control and operate, the data processing results can be saved directly to disks. This instrument will be applied in other weak signal detection systems.

Paper Details

Date Published: 6 December 2011
PDF: 6 pages
Proc. SPIE 8197, 2011 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 81971F (6 December 2011); doi: 10.1117/12.907283
Show Author Affiliations
Zhongjian Gao, Fujian Normal Univ. (China)
Hua Zheng, Fujian Normal Univ. (China)
Lianhuang Li, Fujian Normal Univ. (China)
Fang Chen, Fujian Normal Univ. (China)
Fuyuan Guo, Fujian Normal Univ. (China)


Published in SPIE Proceedings Vol. 8197:
2011 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments
Yongtian Wang; Yunlong Sheng; Han-Ping Shieh; Kimio Tatsuno, Editor(s)

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