RESOLUTION-CONTROLLABLE OPTICAL-TIME DOMAIN REFLECTOMETRY BASED ON LOW COHERENCE INTERFERENCE

被引：1

作者：

TAKADA, K ^{[1
]}

HIMENO, A ^{[1
]}

YUKIMATSU, K ^{[1
]}

机构：

[1] NIPPON TELEGRAPH & TEL PUBL CORP, MUSASHINO ELECT COMMUN LAB, PHOTON SWITCHING GRP, MUSASHINO, TOKYO 180, JAPAN

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 1991年 / 9卷 / 11期

关键词：

D O I：

10.1109/50.97643

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A low coherence OTDR that can control spatial resolution is proposed to efficiently diagnose waveguides. This is achieved by proposing a new light source consisting of an SLD, an optical bandpass filter for truncating the SLD output, and an AR-coated LD booster amplifier. The spatial resolution is determined by the bandwidth of the filter. Two resolutions, 44 and 14-mu-m, are experimentally demonstrated with and without the filter having a 2.7-nm FWHM, respectively. The length of the blind space and the minimum detectable reflectivity are respectively < 7 mm and < -134 dB at a 3-Hz detection bandwidth, for both resolutions. The noise characteristics of the light source and the system performance are investigated theoretically and experimentally.

引用

页码：1534 / 1539

页数：6

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