WATER SENSING METHOD WITH OTDR AND OPTICAL SENSOR FOR NON-PRESSURIZED OPTICAL-FIBER CABLE SYSTEM

被引：0

作者：

TAKASHIMA, S ^{[1
]}

KAWASE, M ^{[1
]}

TOMITA, S ^{[1
]}

机构：

[1] NIPPON TELEGRAPH & TEL PUBL CORP, TELECOMMUN FIELD SYST RES & DEV CTR, TOKAI, IBARAKI 31911, JAPAN

来源：

IEICE TRANSACTIONS ON COMMUNICATIONS | 1994年 / E77B卷 / 06期

关键词：

COMMUNICATION CABLE; OPTICAL FIBER; WATER SENSING; RELIABILITY;

D O I：

暂无

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：

We describe a new water sensing system for optical fiber cable networks. This system consists of optical fibers, water sensors and an OTDR (Optical Time Domain Reflectometer). The water sensor contains material which swells on contact with water and bends the optical fiber. The OTDR monitors the optical loss increase caused by this fiber bending and determines its location. In this system it is very important to determine the loss increase caused by the water sensor in terms of the OTDR performance. Therefore, we clarified the relationship between the water sensor structure and the increase in loss. Based on this study, we fabricated a sensor which causes a 5 dB loss increase. The measured value is very close to the calculated value.

引用

页码：794 / 799

页数：6

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