Title :
Integrated optic lithium niobate image rejection circuit giving minimum channel spacing for 622 Mbit/s CPFSK link
Author :
Cush, Rosie ; Wood, Nicholas ; Johnson, P.T. ; Duthie, P.J. ; Park, C. ; Debney, B.T.
Author_Institution :
GEC-Marconi Materials Technology Ltd., Towcester, UK
Abstract :
A minimum channel spacing of 1.2 GHz has been achieved in a 622 Mbit/s CPFSK optical heterodyne link using image rejection. The image rejection circuit, which included a lithium niobate integrated 90 degrees optical hybrid, provided over 23 dB of rejection and resulted in a greater than threefold increase in achievable channel density.
Keywords :
frequency shift keying; hybrid integrated circuits; integrated optoelectronics; lithium compounds; optical communication equipment; optical links; 622 Mbit/s; CPFSK; LiNbO 3; channel density; image rejection circuit; minimum channel spacing; optical heterodyne link; optical hybrid;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19921474
