Multi-beam interference competition in heterodyne detection

doi:10.1007/s11801-019-8149-7

CIOMP OpenIR

	Multi-beam interference competition in heterodyne detection
	S.-s.Wu; T.Lu; Y.-y.Li; T.-f.Wang; J.Guo
	2019
发表期刊	Optoelectronics Letters
ISSN	16731905
卷号	15 期号:3 页码:213-216
摘要	In a typical infrared optical system, the "Narcissus" effect exists extensively. This concept can be extended into a heterodyne detection. In a heterodyne detection, besides the probe and local oscillator beams, a third coherent beam or even more beams caused by spurious reflection might interfere with each other on the surface of the photodetector. Generation of heterodyne signal is dependent on the interference effects between regular and unexpected waves. Based on the theory of PM demodulation, we analyze the effect of multi-beam interference competition in a laser Doppler vibrometer (LDV). A mathematical analysis demonstrates that the signal competition depends on the modulation index, the amplitude ratio of competing signals and their relative phases. The distortion of demodulated signal due to the appearance of ripples or spikes is also predicted in this study. These effects are verified by setting up an all-fiber LDV system for measuring vibration. 2019, Tianjin University of Technology and Springer-Verlag GmbH Germany, part of Springer Nature.
关键词	Heterodyne detection,Heterodyning,Laser Doppler velocimeters,Laser theory,Optical systems
DOI	10.1007/s11801-019-8149-7
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收录类别	EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/62943
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	S.-s.Wu,T.Lu,Y.-y.Li,et al. Multi-beam interference competition in heterodyne detection[J]. Optoelectronics Letters,2019,15(3):213-216.
APA	S.-s.Wu,T.Lu,Y.-y.Li,T.-f.Wang,&J.Guo.(2019).Multi-beam interference competition in heterodyne detection.Optoelectronics Letters,15(3),213-216.
MLA	S.-s.Wu,et al."Multi-beam interference competition in heterodyne detection".Optoelectronics Letters 15.3(2019):213-216.

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