Crosstalk suppression of a balanced bridge interferometric-type LiNbO 3 optical switch by using mach-zehnder structures

Akito Chiba; Tetsuya Kawanishi; Takahide Sakamoto; Kaoru Higuma; Masayuki Izutsu

doi:10.1109/LPT.2008.921854

Crosstalk suppression of a balanced bridge interferometric-type LiNbO ₃ optical switch by using mach-zehnder structures

Akito Chiba^*, Tetsuya Kawanishi, Takahide Sakamoto, Kaoru Higuma, Masayuki Izutsu

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

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.

Original language	English
Pages (from-to)	872-874
Number of pages	3
Journal	IEEE Photonics Technology Letters
Volume	20
Issue number	10
DOIs	https://doi.org/10.1109/LPT.2008.921854
Publication status	Published - 2008 May 15
Externally published	Yes

Keywords

Integrated optics
Lithium compounds
Optical crosstalk
Optical directional couplers (DCs)
Optical planar waveguides
Optical switches

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

Access to Document

10.1109/LPT.2008.921854

Cite this

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title = "Crosstalk suppression of a balanced bridge interferometric-type LiNbO 3 optical switch by using mach-zehnder structures",

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 = "Integrated optics, Lithium compounds, Optical crosstalk, Optical directional couplers (DCs), Optical planar waveguides, Optical switches",

author = "Akito Chiba and Tetsuya Kawanishi and Takahide Sakamoto and Kaoru Higuma and Masayuki Izutsu",

note = "Funding Information: Manuscript received December 20, 2007; revised February 22, 2008. This work was supported in part by the New Energy and Industrial Development Organization (NEDO) (04A12007), and by the Japan Society for the Promotion of Science (JSPS) (17686032). A. Chiba, T. Kawanishi, T. Sakamoto, and M. Izutsu are with the National Institute of Information and Communication Technology (NICT), Koganei-shi, Tokyo 184-8795, Japan (e-mail: kawanish@nict.go.jp). K. Higuma is with the New Technology Research Laboratory, Sumitomo Osaka Cement Co., Ltd., Funabashi-shi, Chiba 274-8601, Japan. Color versions of one or more of the figures in this letter are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/LPT.2008.921854",

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AU - Chiba, Akito

AU - Kawanishi, Tetsuya

AU - Sakamoto, Takahide

AU - Higuma, Kaoru

AU - Izutsu, Masayuki

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PY - 2008/5/15

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N2 - 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.

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