DocumentCode :
780385
Title :
Dilated Networks for Photonic Switching
Author :
Padmanabhan, Krishnan ; Netravali, Arun N.
Author_Institution :
AT&T Bell Labs.,Murray Hill, NJ
Volume :
35
Issue :
12
fYear :
1987
fDate :
12/1/1987 12:00:00 AM
Firstpage :
1357
Lastpage :
1365
Abstract :
We present some novel architectures for rearrangeably nonblocking multistage photonic space switches implemented using arrays of Ti:LiNbO_{3} directional couplers. Multistage networks, studied mostly in the electronic domain, are obtained by minimizing the number of 2 × 2 elements needed to implement a switch. Unfortunately, straightforward extensions of these networks to the photonic domain show that the switch size has to be severely limited by the crosstalk in each of the Ti:LiNbO_{3} 2 \\times 2 switching elements. Our networks, on the other hand, have a controllable (including almost zero) amount of crosstalk, low optical path loss, and an asymptotically optimal number of directional coupler switches for a given switch size. In addition, the switch has a simple control algorithm and its performance for light loading appears very promising. The switch is easily decomposable into smaller arrays of no more than two types, making it easy to partition the switch into chips. At the cost of a slight increase in crosstalk, the switch can be made single fault tolerant in terms of its ability to connect any input to any output.
Keywords :
Crosstalk; Optical switches; Directional couplers; Lighting control; Optical control; Optical crosstalk; Optical fiber networks; Optical losses; Optical switches; Optimal control; Partitioning algorithms; Size control;
fLanguage :
English
Journal_Title :
Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
0090-6778
Type :
jour
DOI :
10.1109/TCOM.1987.1096722
Filename :
1096722
Link To Document :
بازگشت