Title :
Compact tunable FIR dispersion compensator in SiON technology
Author :
Horst, F. ; Germann, R. ; Bapst, U. ; Wiesmann, D. ; Offrein, B.J. ; Bona, G.L.
Author_Institution :
IBM Res., Zurich Res. Lab., Ruschlikon, Switzerland
Abstract :
We present a tunable dispersion compensator, based on a sixth-order finite impulse response lattice filter. The filter has a free spectral range of 100 GHz and can be tuned for linear group delay slopes between -100 and 100 ps/nm with less than 1-ps ripple over a usable bandwidth of more than 60 GHz. Within this usable bandwidth, the average polarization-mode dispersion is low, reaching 2.4 ps only for extreme group delay slopes. The filter can also generate higher order group delay curves, for example for dispersion slope compensation.
Keywords :
FIR filters; compensation; lattice filters; optical directional couplers; optical fibre dispersion; optical fibre filters; optical fibre polarisation; optical tuning; silicon compounds; 60 GHz; SiON; SiON technology; average polarization-mode dispersion; compact tunable FIR dispersion compensator; dispersion slope compensation; extreme group delay slopes; free spectral range; higher order group delay curves; linear group delay slopes; ripple; sixth-order finite impulse response lattice filter; usable bandwidth; Bandwidth; Bit rate; Delay lines; Fiber gratings; Finite impulse response filter; Fluctuations; Optical filters; Optical refraction; Optical ring resonators; Optical waveguides;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2003.818671
