Radio-frequency low-coherence interferometry

被引：18

作者：

Fernandez-Pousa, Carlos R. ^{[1
]}

Mora, Jose ^{[2
]}

Maestre, Haroldo ^{[1
]}

Corral, Pablo ^{[1
]}

机构：

[1] Univ Miguel Hernandez, Dept Commun Engn, Elche 03202, Spain

[2] Univ Politecn Valencia, ITEAM Res Inst, Valencia 46022, Spain

来源：

OPTICS LETTERS | 2014年 / 39卷 / 12期

关键词：

SENSOR; FILTER; RESOLUTION;

D O I：

10.1364/OL.39.003634

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A method for retrieving low-coherence interferograms, based on the use of a microwave photonics filter, is proposed and demonstrated. The method is equivalent to the double-interferometer technique, with the scanning interferometer replaced by an analog fiber-optics link and the visibility recorded as the amplitude of its radio-frequency (RF) response. As a low-coherence interferometry system, it shows a decrease of resolution induced by the fiber's third-order dispersion (beta(3)). As a displacement sensor, it provides highly linear and slope-scalable readouts of the interferometer's optical path difference in terms of RF, even in the presence of third-order dispersion. In a proof-of-concept experiment, we demonstrate 20-mu m displacement readouts using C-band EDFA sources and standard single-mode fiber. (C) 2014 Optical Society of America

引用

页码：3634 / 3637

页数：4

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