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

Volume

9

Issue

12

fYear

1991

fDate

12/1/1991 12:00:00 AM

Firstpage

1726

Lastpage

1732

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;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.108717

Filename

108717