Title:
OPTICAL MODULATOR
Document Type and Number:
WIPO Patent Application WO/2020/202596
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an optical modulator in which a plurality of Mach-Zehnder type optical waveguides are integrated, the optical modulator being able to be driven at low voltage and suppressing occurrence of a crosstalk phenomenon. Provided is an optical modulator in which an optical waveguide 10 and a control electrode are formed on a substrate 1 having an electro-optical effect, the optical waveguide has a structure in which a plurality of Mach-Zehnder type optical waveguides are disposed in parallel, and the control electrode has a GSSG type differential electrode structure in which two signal electrodes S (S1 and S2 or S3 and S4) are disposed between two ground electrodes G (G1 and G2 or G2 and G3) with respect to one of the Mach-Zehnder type optical waveguides. The optical modulator is characterized in that a crosstalk suppression means for suppressing signal crosstalk is provided in the ground electrode (G2) sandwiched between adjacent Mach-Zehnder type optical waveguides.
Inventors:
MIYAZAKI NORIKAZU (JP)
OKAHASHI KOSUKE (JP)
MOTOYA MASAYUKI (JP)
OKAHASHI KOSUKE (JP)
MOTOYA MASAYUKI (JP)
Application Number:
PCT/JP2019/032007
Publication Date:
October 08, 2020
Filing Date:
August 15, 2019
Export Citation:
Assignee:
SUMITOMO OSAKA CEMENT CO LTD (JP)
International Classes:
G02F1/035
Foreign References:
| JP2014191095A | 2014-10-06 | |||
| JPH11266105A | 1999-09-28 | |||
| JP2012163840A | 2012-08-30 |
Attorney, Agent or Firm:
TAMURA Chikashi et al. (JP)
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