Title :
The effect of analog video modulation on laser clipping noise in optical video-distribution networks
Author :
Wagner, Stuart S. ; Chapuran, Thomas E. ; Menendez, Ronald C.
Author_Institution :
Bellcore, Morristown, NJ, USA
Abstract :
Laser clipping distortion has been shown to cause potentially severe bit-error-rate (BER) floors in hybrid fiber/coax (HFC) networks carrying a combination of analog and digital video signals. Previous experimental investigations have generally used unmodulated analog carriers to quantify the effects of laser clipping. This paper provides experimental measurements of clipping noise and BER performance when the analog carriers are modulated, as they would be in actual systems. Comparisons with the case of unmodulated carriers are also given. Dramatic reductions in clipping-related degradation are observed once the carriers are modulated, suggesting that laser clipping will not pose a significant impediment to digital transmission in future HFC networks.
Keywords :
noise measurement; optical fibre subscriber loops; optical modulation; optical noise; television networks; video signals; BER performance; analog carrier modulation; analog video modulation; analog video signals; bit-error-rate floors; clipping noise measurement; clipping-related degradation; digital transmission; digital video signals; future HFC networks; hybrid fiber/coax networks; laser clipping; laser clipping noise; optical video-distribution networks; unmodulated analog carriers; Bit error rate; Coaxial components; Distortion measurement; Fiber lasers; Hybrid fiber coaxial cables; Laser noise; Optical distortion; Optical fiber networks; Optical modulation; Optical noise;
Journal_Title :
Photonics Technology Letters, IEEE
