DocumentCode :
1143111
Title :
Crosstalk Suppression of a Balanced Bridge Interferometric-Type LiNbO 
Optical Switch by Using Mach–Zehnder Structures
Author :
Chiba, Akito ; Kawanishi, Tetsuya ; Sakamoto, Takahide ; Higuma, Kaoru ; Izutsu, Masayuki
Author_Institution :
Nat. Inst. of Inf. & Commun. Technol., Tokyo
Volume :
20
Issue :
10
fYear :
2008
fDate :
5/15/2008 12:00:00 AM
Firstpage :
872
Lastpage :
874
Abstract :
Crosstalk in a balanced bridge interferometric-type optical switch is highly suppressed by using Mach-Zehnder (MZ) structures as intensity trimmers. An imbalance in optical power is caused by deviations from the ideal dividing ratio of directional couplers in the switch, which causes an increase in the crosstalk. This imbalance was compensated for by adjusting the transmittances of the nested MZ structures. A crosstalk of less than 55 dB has been achieved even for alternating voltage signals. It is also shown that the crosstalk reduction is possible for a control voltage signal of more than 10 GHz, which is based on double-sideband suppressed-carrier modulation spectra measurement results.
Keywords :
Mach-Zehnder interferometers; integrated optics; light interference; lithium compounds; optical switches; LiNbO; Mach-Zehnder structure; balanced bridge interferometric type optical switch; crosstalk reduction; crosstalk suppression; double-sideband suppressed-carrier modulation spectra measurement; integrated optics; optical directional couplers; optical planar waveguides; optical power imbalance; Bridge circuits; Directional couplers; Distributed control; Optical crosstalk; Optical distortion; Optical interferometry; Optical modulation; Optical packet switching; Optical switches; Optical waveguides; Integrated optics; lithium compounds; optical crosstalk; optical directional couplers (DCs); optical planar waveguides; optical switches;
fLanguage :
English
Journal_Title :
Photonics Technology Letters, IEEE
Publisher :
ieee
ISSN :
1041-1135
Type :
jour
DOI :
10.1109/LPT.2008.921854
Filename :
4497369
Link To Document :
