Title :
A 16-channel frequency selection switch for optical FDM distribution systems
Author :
Oda, Kazuhiro ; Takato, Norio ; Kominato, Toshimi ; Toba, Hiromu
Author_Institution :
NTT Transmission Syst. Lab., Kanagawa, Japan
fDate :
8/1/1990 12:00:00 AM
Abstract :
The performance of a 5-GHz-spaced, 16-channel frequency selection switch (FS-SW) for optical frequency division multiplexing (FDM) distribution systems is described. The silica waveguide-type FS-SW is constructed with four serially connected periodic filters integrated on a silicon chip. The required crosstalk level for each periodic filter of the FS-SW was estimated to be -21.0 dB for a 16-channel FS-SW and 23.6 dB for a 128-channel FS-SW. Crosstalk can be independent of the power coupling ratio of the 3-dB-coupler regions by choosing suitable connecting configurations for the periodic filters. A controller for the switch is also described and the desired channel can be selected successfully from among 16 optical carriers under an average crosstalk level of less than -20 dB
Keywords :
frequency division multiplexing; optical switches; 16-channel frequency selection switch; 3-dB-coupler; 5 GHz; Si chip; SiO2; controller; crosstalk; frequency division multiplexing; optical FDM distribution systems; optical carriers; periodic filters; power coupling ratio; silica waveguide; Frequency division multiplexing; Optical crosstalk; Optical filters; Optical interferometry; Optical mixing; Optical receivers; Optical sensors; Optical switches; Optical transmitters; Optical waveguides;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
