Ranging system based on optical carrier-based microwave interferometry

Autor:	Bin Wu, Aiqi Ding, Yibing Hou, Jiantao Yue
Rok vydání:	2021
Předmět:	Materials science business.industry Phase (waves) Phase detector Atomic and Molecular Physics and Optics Interferometry Optics Optical path Optical Carrier transmission rates Electrical and Electronic Engineering business Engineering (miscellaneous) Frequency modulation Refractive index Microwave
Zdroj:	Applied optics. 60(29)
ISSN:	1539-4522
Popis:	To compensate for the refractive index errors in optical carrier-based microwave interferometry (OCMI), a ranging system is designed to measure the single-arm optical path of OCMI. A high-speed photodetector and a downconversion method are used to acquire the microwave envelope of the interference signal. A Hilbert transformation is used to realize phase detection. Simulation shows the linear relationship between the phase and optical length in a period. Adjusting the microwave frequency can resolve the phase ambiguity. The experimental results show that when the maximum microwave modulation frequency is set to 1.5 GHz, the standard deviation of the measured data can be limited to the level of 10 − 5 .
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e982f401fb09fb62741497302249d5c8 https://pubmed.ncbi.nlm.nih.gov/34623991 Zobrazit plný text záznamu