A single channel input virtual dual-phase lock-in amplifier

Zhongjian Gao; Hua Zheng; Lianhuang Li; Fang Chen; Fuyuan Guo

doi:10.1117/12.907283

5 December 2011 A single channel input virtual dual-phase lock-in amplifier

Zhongjian Gao, Hua Zheng, Lianhuang Li, Fang Chen, Fuyuan Guo

Proceedings Volume 8197, 2011 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments; 81971F (2011) https://doi.org/10.1117/12.907283
Event: International Conference on Optical Instruments and Technology (OIT2011), 2011, Beijing, Beijing, China

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.

Citation Download Citation

Zhongjian Gao, Hua Zheng, Lianhuang Li, Fang Chen, and Fuyuan Guo "A single channel input virtual dual-phase lock-in amplifier", Proc. SPIE 8197, 2011 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 81971F (5 December 2011); https://doi.org/10.1117/12.907283

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