Title:
DISTRIBUTED OPTICAL FIBER TEMPERATURE SENSOR
Document Type and Number:
Japanese Patent JP3846053
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a distributed optical fiber temperature sensor having a high loss temperature sensitivity and a wide temperature measuring range.
SOLUTION: Pulse light of 1.55 μm wavelength band outputted from an optical pulse tester 100 enters an optical fiber 200 principally comprising quartz glass and added with OH group into core region and propagates through the optical fiber 200. Back scattering light is detected by the optical pulse tester 100 and the loss distribution in the longitudinal direction of the optical fiber 200 is determined based on the detected back scattering light and then temperature distribution in the longitudinal direction of the optical fiber 200 is determined based on the temperature dependency of loss of the optical fiber 200.
Inventors:
Shinji Ishikawa
Seiichi Mobara
Hiroo Kanamori
Yoshiyuki Suetsugu
Seiichi Mobara
Hiroo Kanamori
Yoshiyuki Suetsugu
Application Number:
JP24616798A
Publication Date:
November 15, 2006
Filing Date:
August 31, 1998
Export Citation:
Assignee:
Sumitomo Electric Industries, Ltd.
International Classes:
G01K11/12; C03B20/00; C03C13/04; G02B6/02; (IPC1-7): G01K11/12; C03B20/00; C03C13/04; G02B6/02
Domestic Patent References:
| JP6281510A | ||||
| JP4018780B2 | ||||
| JP10059730A | ||||
| JP8240451A | ||||
| JP5147966A | ||||
| JP6003536A |
Attorney, Agent or Firm:
Yoshiki Hasegawa
Tatsuya Shioda
Shiro Terasaki
Yuichi Yamada
Masatoshi Shibata
Tatsuya Shioda
Shiro Terasaki
Yuichi Yamada
Masatoshi Shibata