Title :
Simple tunable all-fiber delay line filter for dispersion compensation
Author :
Duthel, Thomas ; Otto, Michael ; Schäffer, Christian G.
Author_Institution :
Inst. fur Nachrichrentechnik, Technische Univ. Dresden, Germany
Abstract :
A delay line filter with tunable group delay for residual dispersion compensation is presented. The device is suitable for channel bit rates of 40 Gb/s and consists mainly of two 3 × 3 fiber couplers connected in series. Due to the all-fiber implementation, it has low polarization sensitivity and can be directly inserted in the transmission line. Its dispersion value can be tuned by simply changing the optical phase in one filter path. Thereby, a tuning range of ±50 ps/nm is realized with a very good agreement between simulation and measurement.
Keywords :
FIR filters; adaptive filters; delay filters; digital filters; optical fibre communication; optical fibre couplers; optical fibre dispersion; optical fibre filters; optical fibre polarisation; optical tuning; 40 Gbit/s; adaptive filters; delay line filter; dispersion compensation; fiber couplers; finite impulse response digital filters; optical fiber coupler; optical fiber dispersion; optical fiber filters; optical interferometry; polarization sensitivity; residual dispersion compensation; tunable filter; tunable group delay; Bit rate; Delay lines; Optical fiber couplers; Optical fiber devices; Optical fiber filters; Optical fiber polarization; Optical filters; Optical sensors; Optical tuning; Transmission line measurements;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.834555
