Title :
Nonlinear distortion of Fabry-Perot optical filters in direct modulated dense WDM-SCM video distribution systems
Author :
Suzuki, Y. ; Ohta, N. ; Hirabayashi, K.
Author_Institution :
NTT Corp., Kanagawa, Japan
fDate :
4/1/1993 12:00:00 AM
Abstract :
Fabry-Perot-type optical filters (FPFs) are found to induce nonlinear distortion in dense wavelength division multiplexing with subcarrier multiplexing (WDM-SCM) analog video distribution systems. An analysis of the distortion caused by the interaction of filter transmittance tilt with chirped laser light determines that second-order distortion, which is greatly influenced by filter detuning shift and phase difference between IM and FM parts of the laser light, can be eliminated when the phase difference is 0 or pi , and wavelength displacement between LD output and the FPF is equal to one-half the laser chirp parameter. Transmission experiments using 40-channel AM-FDM video signals support these statements.<>
Keywords :
amplitude modulation; frequency modulation; optical communication equipment; optical filters; optical links; subcarrier multiplexing; visual communication; wavelength division multiplexing; 40-channel AM-FDM video signals; FM parts; Fabry-Perot optical filters; IM part; chirped laser light; direct modulated dense WDM-SCM video distribution systems; filter detuning shift; filter transmittance tilt; nonlinear distortion; phase difference; second-order distortion; subcarrier multiplexing; transmission experiments; wavelength displacement; wavelength division multiplexing; Fabry-Perot; Fiber nonlinear optics; Laser noise; Nonlinear distortion; Nonlinear optics; Optical distortion; Optical feedback; Optical filters; Optical modulation; Optical refraction;
Journal_Title :
Photonics Technology Letters, IEEE
