Title :
General Design Rules for the Synthesis of Dispersion and Dispersion Slope Compensation FIR and IIR Filters With Reduced Complexity
Author :
Neumann, Niels ; Duthel, Thomas ; Haas, Michael ; Schäffer, Christian G.
Author_Institution :
Technische Univ. Dresden, Dresden
Abstract :
Chromatic dispersion is one of the main transmission impairments in optical systems with high bit rates, because the dispersion limit scales with the square of the data rate. Optical delay-line filters can be used to compensate dispersion and dispersion slope. They can be designed as feedforward finite-impulse response filters or as all-pass infinite-impulse response filters. Due to the time-variant property of the dispersion, those filters have to be adaptive, which requires fast and reliable calculation of the filter coefficients. In this paper, a new approach to calculate filter coefficients by applying analytical methods is presented. Design examples are given, and the filter performance is discussed.
Keywords :
adaptive optics; optical communication equipment; optical delay lines; optical design techniques; optical filters; adaptive filters; all-pass infinite-impulse response filters; bit rates; chromatic dispersion; dispersion slope compensation; feedforward finite-impulse response filters; filter coefficients; optical delay-line filters; time-variant property; transmission impairments; Adaptive filters; Arrayed waveguide gratings; Delay; Digital filters; Finite impulse response filter; IIR filters; Optical feedback; Optical filters; Optical interferometry; Optical ring resonators; All-pass filters; dispersion; filtering; finite-impulse response (FIR) digital filters; infinite-impulse response (IIR) digital filters; optical communication; optical filters;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2007.905218
