Title :
Coherent FM-SCM system using DFB lasers and a phase noise cancellation circuit
Author :
Gross, Richard ; Olshansky, Robert ; Schmidt, Mark
Author_Institution :
GTE Lab. Inc., Waltham, MA, USA
Abstract :
A multichannel coherent subcarrier multiplexing (SCM) system using standard distributed-feedback lasers is discussed. A simple phase noise canceling circuit yields excellent quality FM video transmission (SNR=56 dB), even though the 50-MHz IF linewidth exceeds the 30-MHz signal bandwidth.<>
Keywords :
distributed feedback lasers; frequency modulation; interference suppression; multiplexing equipment; optical communication equipment; video signals; 30 MHz; DFB lasers; FM video transmission; IF linewidth; multichannel coherent subcarrier multiplexing system; phase noise cancellation circuit; signal bandwidth; Bandwidth; Circuits; Frequency modulation; Laser noise; Optical modulation; Optical noise; Optical receivers; Phase modulation; Phase noise; Signal to noise ratio;
Journal_Title :
Photonics Technology Letters, IEEE
