FADING NOISE-REDUCTION IN COHERENT OTDR

被引：71

作者：

IZUMITA, H

FURUKAWA, S

KOYAMADA, Y

SANKAWA, I

机构：

[1] NTT Telecommunication Field Systems R&D Center, Tokai, lbaraki-ken

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 1992年 / 4卷 / 02期

关键词：

D O I：

10.1109/68.122361

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：

This letter describes a reduction in fading noise which causes amplitude fluctuation on a backscattered trace in coherent OTDR. In order to reduce the fading noise, the optical frequency of the DFB-LD is changed by changing the LD temperature during the integrations of the backscattered signals. At the same time, the state of polarization of the launched signal pulses is changed. The amplitude fluctuation has been reduced to as low as 0.06 dB.

引用

页码：201 / 203

页数：3

共 8 条

[1] OTDR IN SINGLE-MODE FIBER AT 1.5-MU-M USING HETERODYNE-DETECTION [J].