Multi-beam interference competition in heterodyne detection

doi:10.1007/s11801-019-8149-7

CORC > 长春光学精密机械与物理研究所 > 中国科学院长春光学精密机械与物理研究所

	Multi-beam interference competition in heterodyne detection
	S.-s.Wu; T.Lu; Y.-y.Li; T.-f.Wang; J.Guo
刊名	Optoelectronics Letters
	2019
卷号	15 期号:3 页码:213-216
关键词	Heterodyne detection,Heterodyning,Laser Doppler velocimeters,Laser theory,Optical systems
ISSN号	16731905
DOI	10.1007/s11801-019-8149-7
英文摘要	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.
URL标识	查看原文
内容类型	期刊论文
源URL	[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.