Title :
Integrated-optic dispersion slope equalizer for N× several tens of Gb/s WDM transmission
Author :
Takiguchi, Koichi ; Okamoto, Katsunari ; Goh, Takashi ; Itoh, Mikitaka
Author_Institution :
Photonics Labs., NTT Corp., Kanagawa, Japan
Abstract :
We report a dispersion slope equalizer on a planar lightwave circuit for wavelength division multiplexing (WDM) transmission. This device consists of an array of lattice-formed equalizers with different compensation values fabricated on one wafer and arrayed-waveguide gratings for wavelength multi/demultiplexing. We describe its configuration, operational principle, parameter design, fabrication, and measured characteristics in detail. N×20 and N×40 Gb/s slope equalizers were fabricated and their characteristics agreed well with designed values. We also report a reduction in the bias electrical power needed for thermooptic phase shifters in the equalizer array that we realized by employing a phase trimming technique normally used for optical switches.
Keywords :
arrayed waveguide gratings; demultiplexing equipment; equalisers; multiplexing equipment; optical communication equipment; optical planar waveguides; wavelength division multiplexing; arrayed-waveguide gratings; fabrication; integrated-optic dispersion slope equalizer; lattice-formed equalizers; parameter design; phase trimming technique; planar lightwave circuit; silica-based waveguides; thermooptic phase shifters; transfer function; wavelength division multiplexing; wavelength multi/demultiplexing; Circuits; Demultiplexing; Equalizers; Fabrication; Gratings; Optical arrays; Phase shifters; Phased arrays; Wavelength division multiplexing; Wavelength measurement;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2003.819129
