Title :
A rearrangeable multichannel free-space optical switch based on multistage network configuration
Author :
Noguchi, Kazuhiro ; Sakano, Toshikazu ; Matsumoto, Takao
Author_Institution :
NTT Transmission Syst. Lab., Kanagawa, Japan
fDate :
12/1/1991 12:00:00 AM
Abstract :
A rearrangeable 128×128-channel optical switch based on a multistage network configuration is demonstrated. The properties of optical components required for achieving up to 1000×1000-channel switches are discussed, taking into account the diffraction limit and liquid crystal light modulator (LCLM) crosstalk. An examination of the insertion loss and crosstalk properties of the switch reveals an average loss and crosstalk of 7.9 and -21.2 dB, respectively, and worst-case loss and crosstalk of 11.0 and -12.8 dB, respectively. Such low-loss and low-crosstalk properties indicate that the proposed switch structure is suitable for a large-scale rearrangeable switch
Keywords :
crosstalk; liquid crystal devices; optical interconnections; optical losses; optical modulation; optical switches; 11 dB; 7.9 dB; average loss; crosstalk; diffraction limit; insertion loss; liquid crystal light modulator; multistage network configuration; optical components; parallel processing computer switches; rearrangeable multichannel free-space optical switch; switch structure; Large-scale systems; Optical arrays; Optical collimators; Optical crosstalk; Optical devices; Optical interconnections; Optical losses; Optical polarization; Optical switches; Routing;
Journal_Title :
Lightwave Technology, Journal of
