Title:
光ファイバ特性測定装置及び光ファイバ特性測定方法
Document Type and Number:
Japanese Patent JP6791218
Kind Code:
B2
Abstract:
An optical fiber characteristic measurement apparatus (1) includes: a light source (11) configured to output a laser beam of which frequency is modulated; an incident part (12, 13, 14, and 15) configured to make the laser beam output from the light source be incident from one end and another end of an optical fiber (FUT) as continuous light (L 1) and pulsed light (L2), respectively; a light detector (16) configured to detect light projected from the optical fiber and output a detection signal (D1); and a detector (17 and 18a) configured to detect, in a first period (T1) in which scattering light based on the continuous light and the pulsed light is projected from the optical fiber and a second period (T2) shorter than the first period, in which the scattering light is not projected from the optical fiber, the scattering light based on integrated values acquired by integrating the detection signal for a predetermined time.
Inventors:
Satoshi Matsuura
Yoshihiro Kumagai
Yoshihiro Kumagai
Application Number:
JP2018167895A
Publication Date:
November 25, 2020
Filing Date:
September 07, 2018
Export Citation:
Assignee:
Yokogawa Electric Corporation
International Classes:
G01D5/353
Domestic Patent References:
| JP2012159387A | ||||
| JP6109589A |
Foreign References:
| WO2008084637A1 | ||||
| US20060146337 | ||||
| KR101358942B1 |
Other References:
鷲山 和希 ほか,光ファイバ方向掃引方式によるBOCDA歪分布測定の高速化 High Speed BOCDA Measurement of Strain Dis,電子情報通信学会2013年総合大会講演論文集 エレクトロニクス1 PROCEEDINGS OF THE 2013 IEICE GENE,日本,2013年 3月21日,223,ISSN 1349-1369
Attorney, Agent or Firm:
Sumio Tanai
Yoshifumi Saeki
Hisanori Takahashi
Takeo Okita
Yoshifumi Saeki
Hisanori Takahashi
Takeo Okita