Title :
Tunable polymer optical add/drop filter for multiwavelength networks
Author :
Kostrzewa, C. ; Moosburger, R. ; Fischbeck, G. ; Schuppert, B. ; Petermann, K.
Author_Institution :
Fachgebiet Hochfrequenzetech., Tech. Univ. Berlin, Germany
Abstract :
We present a polymer optical add/drop filter with a channel cross-talk of -18.5 dB, a free spectral range of 12.8 nm and a channel spacing of 400 GHz (4 channels) as well as a tunable optical filter with a free spectral range of 50 nm. Both filter designs are based on a synthesis which provides the minimum number of filter stages for a given channel crosstalk and number of channels. Wavelength tunability over the entire free-spectral range (FSR) is demonstrated with applied heating powers of 500 mW. For the narrow bandwidth filter we used a fluorinated high temperature stable polymer as the waveguiding material, which has proven to exhibit losses as low as 0.25 dB/cm at a wavelength of 1.55 μm.
Keywords :
Mach-Zehnder interferometers; band-pass filters; interference filters; optical communication equipment; optical crosstalk; optical design techniques; optical directional couplers; optical fibre networks; optical polymers; tuning; wavelength division multiplexing; 0.25 dB; 1.55 mum; 500 mW; Mach Zehnder configuration; applied heating powers; channel cross-talk; channel spacing; filter designs; filter stages; fluorinated high temperature stable polymer; free spectral range; losses; multiwavelength networks; narrow bandwidth filter; number of channels; synthesis; tunable optical filter; tunable polymer optical add/drop filter; wavelength tunability; Channel spacing; Heating; Optical crosstalk; Optical fiber networks; Optical filters; Optical polymers; Optical tuning; Optical waveguides; Thermal conductivity; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
