基本信息:
- 专利标题： REPEATER DESIGN FOR DISTRIBUTED ACOUSTIC SENSING ON MULTISPAN FIBER LINKS
- 申请号：PCT/US2021/031659 申请日：2021-05-10
- 公开(公告)号：WO2021231340A1 公开(公告)日：2021-11-18
- 发明人： IP, Ezra , HUANG, Yue-Kai , YAMAN, Fatih , FUJISAWA, Shinsuke
- 申请人： NEC LABORATORIES AMERICA, INC.
- 申请人地址： Suite 200
- 专利权人： NEC LABORATORIES AMERICA, INC.
- 当前专利权人： NEC LABORATORIES AMERICA, INC.
- 当前专利权人地址： Suite 200
- 代理机构： KOLODKA, Joseph
- 优先权： US17/314,006 2021-05-06
- 主分类号： G01H9/00
- IPC分类号： G01H9/00 ; G01V1/22 ; G01V1/40 ; G01N29/24 ; G01H9/004 ; H04B10/071 ; H04Q11/0005 ; H04Q11/0067 ; H04Q2011/0016 ; H04Q2011/0083 ; H04Q2213/13191
摘要：
Aspects of the present disclosure are directed to alternative repeater design(s) that advantageously improve signal-to-noise of distributed acoustic sensing (DAS) systems using coherent detection of Rayleigh backscatter in multi-span links including inline amplification that may be employed for example in undersea submarine systems. The repeater designs incorporate Rayleigh combine units (RCU) and Rayleigh drop units (RDU) to reduce Rayleigh backscatter loss as Rayleigh signal(s) is/are routed to a link that propagates the backscatter signal in an opposite direction relative to interrogation pulse(s).
IPC结构图谱:
| G | 物理 |
| --G01 | 测量；测试 |
| ----G01H | 机械振动或超声波、声波或次声波的测量 |
| ------G01H9/00 | 应用对辐射敏感的装置，例如光学装置，测量机械振动或超声波、声波或次声波 |