发明名称 |
Raman or erbium-doped fiber laser using few-mode fiber grating, and long-distance remote sensor for simultaneously measuring temperature and strain by separating temperature and strain components using the same |
摘要 |
Disclosed are a Raman or erbium-doped fiber laser using a few-mode fiber grating, and a long-distance remote sensor using the same that can simultaneously measure temperature and strain by separating temperature and strain components using Raman amplification or erbium amplification. When a multi-wavelength Raman or erbium-doped laser is configured by means of a short-period fiber grating serving as a few-mode fiber grating at one side of a resonator and a chirped fiber Bragg grating or tunable chirped fiber Bragg grating at the other side of the resonator, multi-wavelength laser signals are generated in different modes. Because wavelength shift and reflectivity vary with a change in temperature and strain, temperature and strain components can be simultaneously measured. Because an optical fiber of several tens of kilometers is used, it can be utilized as a sensing probe of the long-distance remote sensor.
|
申请公布号 |
US2005259697(A1) |
申请公布日期 |
2005.11.24 |
申请号 |
US20040024991 |
申请日期 |
2004.12.29 |
申请人 |
KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY |
发明人 |
HAN YOUNG-GEUN;LEE SANG-BAE;KIM SANG-HYUCK;LEE JU-HAN |
分类号 |
G02B6/26;H01S3/30;(IPC1-7):H01S3/30 |
主分类号 |
G02B6/26 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|