Phase-conjugate distance-measurement interferometer with frequency modulation of a laser-diode

被引：0

作者：

Ishii, Y ^{[1
]}

机构：

[1] Univ Ind Technol, Dept Elect, Sagamihara, Kanagawa 2291196, Japan

来源：

PHOTOREFRACTIVE FIBER AND CRYSTAL DEVICES: MATERIALS, OPTICAL PROPERTIES, AND APPLICATIONS VII, AND OPTICAL DATA STORAGE | 2002年 / 4459卷

关键词：

wide tunable laser diode; phase-conjugate interferometer; cat mirror; FMCW ranging technique;

D O I：

10.1117/12.454008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Laser-diode phase-conjugate interferometer with two self-pumped (cat) phase-conjugate mirrors instead of two ordinary mirrors is constructed for distance measurement over extended ranges. The measurement is based on frequency-modulated continuous-wave techniques. A wide-tunable laser diode (LD),with an external cavity is used to generate the chirping signal. The interferometer is immune to spatially nonuniform phase distortion, but can only detect the spatially uniform phase change introduced by the displacement of one cat mirror. The distance can be measured by detecting the beat frequency with an rf spectrum analyzer. The linear regression of the beat frequency as a function of the distance has been ascertained. The system has been characterized over a measurement range from 0.09 mm to 15.75 mm within 2.49 nm of 0.08 nm in wavelength diversities.

引用

页码：93 / 100

页数：8

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