发明申请
- 专利标题： Single polarization fiber and method of evaluating fiber cutoff wavelengths using optical time domain reflectometry
- 专利标题（中）： 单极化光纤和使用光时域反射测量法评估光纤截止波长的方法
-
申请号： US11331905申请日： 2006-01-13
-
公开(公告)号： US20070165978A1公开(公告)日： 2007-07-19
- 发明人: Xin Chen , Alan Evans , Joohyun Koh , Ming-Jun Li , Daniel Nolan
- 申请人： Xin Chen , Alan Evans , Joohyun Koh , Ming-Jun Li , Daniel Nolan
- 主分类号： G02B6/00
- IPC分类号： G02B6/00
摘要：
A method for measuring fundamental mode cutoff wavelength of single polarization fiber comprising: (i) launching pulsed light of at least one wavelength λi into one end of the single polarization fiber; (ii) measuring backscattered light intensity corresponding to said wavelength to obtain the backscattered light intensity as a function of fiber position, wherein the backscattered light propagates through the same end of the fiber; and (iii) determining at least one cutoff wavelength and the corresponding position within said fiber for the cutoff wavelength, based on a specified threshold light intensity level.