Title :
A bidirectional common polarization control method for coherent optical FDM transmission system
Author :
Yamazaki, S. ; Ono, T. ; Shimizu, H. ; Emura, K.
Author_Institution :
NEC Corp., Kawasaki, Japan
Abstract :
A bidirectional common polarization control method with a single polarization controller for a coherent optical FDM bidirectional transmission system is discussed. This method is promising for realizing a reliable and low-cost terminal in a coherent multichannel distribution system because the polarization controller can be placed in common only at a central office. Theoretical and experimental results show that the frequency separation delta f has to be 6*bit rate< delta f<120/ Delta tau (GHz) for FSK bidirectional transmission. The method is effective not only for reducing the complexity of the subscriber terminal but also for improving the reliability in a coherent CATV system.<>
Keywords :
cable television; electromagnetic wave polarisation; frequency division multiplexing; optical links; FSK bidirectional transmission; bidirectional common polarization control method; central office; coherent CATV system; coherent multichannel distribution system; coherent optical FDM bidirectional transmission system; frequency division multiplexity; frequency separation; single polarization controller; subscriber terminal; Control systems; Dispersion; Fluctuations; Frequency shift keying; Optical control; Optical crosstalk; Optical fiber polarization; Optical polarization; Optical receivers; Optical transmitters;
Journal_Title :
Photonics Technology Letters, IEEE
