The diffraction limit of an optical spectrum analyzer

Autor:	G. S. Tymchik, Valentin G. Kolobrodov, Mykyta S. Kolobrodov
Rok vydání:	2015
Předmět:	Diffraction Spectrum analyzer Observational error business.industry Physics::Optics Fraunhofer diffraction symbols.namesake Optics Approximation error symbols Fresnel number Spatial frequency business Fresnel diffraction Mathematics
Zdroj:	SPIE Proceedings.
ISSN:	0277-786X
DOI:	10.1117/12.2228534
Popis:	This article examines a systematic error that occurs in optical spectrum analyzers and is caused by Fresnel approximation. The aim of the article is to determine acceptable errors of spatial frequency measurement in signal spectrum. The systematic error of spatial frequency measurement has been investigated on the basis of a physical and mathematical model of a coherent spectrum analyzer. It occurs as a result of the transition from light propagation in free space to Fresnel diffraction. Equations used to calculate absolute and relative measurement errors depending on a diffraction angle have been obtained. It allows us to determine the limits of the spectral range according to the given relative error of the spatial frequency measurement.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::fa188d828f89d1275f3ea62eb940ec30 https://doi.org/10.1117/12.2228534 Zobrazit plný text záznamu