Device for increasing signal-to-noise ratio of dense wave division multiplex multiple wavelength light source
Title：
Device for increasing signal-to-noise ratio of dense wave division multiplex multiple wavelength light source
Application Number：
 200310103535
Application Date：
 2003/11/07
Announcement Date：
 2004/11/03
Pub. Date：
Publication Number：
 1542478
Announcement Number：
 1234031
Grant Date：
 2005-12-28
Granted Pub. Date：
 2005-12-28
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 G02B 6/26G02B 6/30G02B 6/42H04J 14/02
Applicant(s)：
 Tsinghua University
Inventor(s)：
 Wang Jianping, Nan Yinbo
Key Words：
 signal-to-noise ratio, light source, dense wave
Abstract：
 The present invention belongs to great capacity fiber communication technology. The device includes ultrashort pulse light source providing ultrashort light pulse signal; fiber amplifier amplifying light pulse signal; fiber expanding the spectrum of the light pulse signal; filter filtering the expanded spectrum to obtain multi-wavelength light source with channel interval coinciding with the communication standard; fiber amplifier amplifying the multi-wavelength light signal; non-linear fiber environment filtering the multi-wavelength light simultaneously to eliminate in-line noise; and waveguide grating array demultiplexing multi-wavelength light signal to obtain single wavelength light signals. The present invention can raise S/N ratio effectively, has no need of outer sync signal and small insertion loss.
Claim：
Priority：
PCT：
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