Title :
Performance improvements in fiber-optic links for multi-carrier TV transmission
Author :
Berceli, T. ; Frigyes, I. ; Gottwald, P. ; Herczfeld, P.R. ; Mernyei, F.
Author_Institution :
Tech. Univ. of Budapest, Hungary
Abstract :
It is pointed out that the intermodulation distortion in fiber-optic links for multicarrier TV transmission can be reduced by improving the modulation linearity of the laser or by applying a more appropriate modulation method. Both solutions are discussed in detail. The linearity has been significantly improved by applying an active matching technique. The sensitivity of QPSK (quadrature phase shift keying) TV transmission to disturbing intermodulation has been investigated. It is shown that a novel group modulation method offers a better approach for optical multicarrier TV transmission.<>
Keywords :
broadband networks; cable television; carrier communication; intermodulation; optical fibres; optical links; optical modulation; phase shift keying; television networks; IMD; QPSK; active matching technique; driving circuit; fiber-optic links; group modulation method; intermodulation distortion; laser; modulation linearity; multi-carrier TV transmission; optical fibre link; optical multicarrier TV transmission; quadrature phase shift keying; Fiber lasers; Impedance; Intermodulation distortion; Linearity; Masers; Optical distortion; Optical modulation; Optical transmitters; Semiconductor lasers; TV;
Conference_Titel :
Microwave Symposium Digest, 1991., IEEE MTT-S International
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-87942-591-1
DOI :
10.1109/MWSYM.1991.146991
