Title :
Performance optimization of directly modulated FM-SCM systems with optical discriminator
Author :
Fiksman, G. ; Gross, R. ; Fan, J. ; Kazovsky, L.
Author_Institution :
GTE Lab., Inc., Waltham, MA, USA
fDate :
7/1/1993 12:00:00 AM
Abstract :
Theoretical models were developed to accurately describe the behavior of directly modulated communication systems with a predetection optical frequency discriminator. A ten-channel 100-Mb/s subcarrier multiplexed (SCM) system with a DFB laser light source and fiber Fabry-Perot discriminator was built. For an input optical power of -17 dBm a system with a 67-GHz Fabry-Perot filter achieved an optimal CNR of 23 dB at a frequency modulation index ( beta ) of 0.5, compared to optimal CNR of 17 dB at beta approximately=0.3 for a system with a 10-GHz discriminator. System performance demonstrated excellent agreement with the theoretical predictions.<>
Keywords :
frequency modulation; optical links; optical modulation; optimisation; semiconductor lasers; subcarrier multiplexing; 100 Mbit/s; 67 GHz; DFB laser light source; SCM; carrier-to-noise ratio; communication systems; directly modulated FM-SCM systems; fiber Fabry-Perot discriminator; frequency modulation index; input optical power; laser diode; optical discriminator; optimal CNR; performance optimization; predetection optical frequency discriminator; subcarrier multiplexed; ten-channel; Communication systems; Fabry-Perot; Fiber lasers; Frequency; Laser modes; Laser theory; Optical filters; Optical modulation; Optimization; Power system modeling;
Journal_Title :
Photonics Technology Letters, IEEE
