Light label scraping wave filter based on optical fibre environment
Title：
Light label scraping wave filter based on optical fibre environment
Application Number：
 200410009168
Application Date：
 2004/06/03
Announcement Date：
 2005/02/23
Pub. Date：
Publication Number：
 1584649
Announcement Number：
 1242284
Grant Date：
 2006-2-15
Granted Pub. Date：
 2006-2-15
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 G02B 6/27, H04B 10/12
Applicant(s)：
 Tsinghua Univ.
Inventor(s)：
 Chen Minghua, Chen Hongwei, Xie Shizhong
Key Words：
 Light label, scraping, wave filter, optical fibre environment
Abstract：
 A filter for erasing optical countermark is featured as setting two pieces of polarization preserving fibres with length ratio of 1:2 in sagnac optical fibre ring mirror as birefringent elements to hold polarization preserving axle in certain angle, inputting light signal and using circulator to arrange it for transmission in order to form filtering spectrum to separate light countermark from data signal.
Claim：
Priority：
PCT：
LegalStatus：

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2008-4-17
  Selected patents owned by Tsinghua University filed in 2005 are loaded.
2008-3-31
  Selected patents owned by Tsinghua University filed in 2006 and 2007 are load.







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