Low-crosstalk balanced bridge interferometric-type optical switch for optical signal routing

Akito Chiba, Tetsuya Kawanishi, Takahide Sakamoto, Kaoru Higuma, Kazumasa Takada, Masayuki Izutsu

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Crosstalk is one of the significant measures of an optical cross-bar switch. In this paper, we describe a configuration for crosstalk suppression of a balanced-bridge interferometric type optical switch and its application to an optical-signal routing device. Since crosstalk of the optical switch originates from imbalance in the amplitude of a lightwave propagating within the arm of the interferometer, additional Mach-Zehnder structures were embedded for trimming the amplitude of the light. By adjusting the transmittance of the trimmers, crosstalk of less than -56 dB is achieved for dc voltage. Also, for high-frequency voltages, a crosstalk estimation procedure was developed, and crosstalk at 10-GHz sinusoidal voltage was evaluated to be -48 dB. Furthermore, based on the transient response measurement, its switching time was evaluated to be 26 ps. For a demonstration utilizing extremely low crosstalk and quick response, a guard-time-free optical signal routing experiment is also described.

Original languageEnglish
Article number6522124
JournalIEEE Journal on Selected Topics in Quantum Electronics
Volume19
Issue number6
DOIs
Publication statusPublished - 2013
Externally publishedYes

Fingerprint

Optical switches
Crosstalk
crosstalk
optical communication
switches
Electric potential
electric potential
Mach-Zehnder interferometers
Trimming
transient response
Transient analysis
transmittance
Demonstrations
adjusting
Switches
retarding
configurations

Keywords

  • Optical crosstalk
  • Optical modulation
  • Optical switches
  • Routing

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics

Cite this

Low-crosstalk balanced bridge interferometric-type optical switch for optical signal routing. / Chiba, Akito; Kawanishi, Tetsuya; Sakamoto, Takahide; Higuma, Kaoru; Takada, Kazumasa; Izutsu, Masayuki.

In: IEEE Journal on Selected Topics in Quantum Electronics, Vol. 19, No. 6, 6522124, 2013.

Research output: Contribution to journalArticle

Chiba, Akito ; Kawanishi, Tetsuya ; Sakamoto, Takahide ; Higuma, Kaoru ; Takada, Kazumasa ; Izutsu, Masayuki. / Low-crosstalk balanced bridge interferometric-type optical switch for optical signal routing. In: IEEE Journal on Selected Topics in Quantum Electronics. 2013 ; Vol. 19, No. 6.
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