The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 24, 2026
Filed:
Aug. 03, 2020
Ntt, Inc., Tokyo, JP;
Josuke Ozaki, Musashino, JP;
Yoshihiro Ogiso, Musashino, JP;
Yasuaki Hashizume, Musashino, JP;
Hiromasa Tanobe, Musashino, JP;
Mitsuteru Ishikawa, Musashino, JP;
NTT, Inc., Tokyo, JP;
Abstract
A semiconductor IQ optical modulator in which a phase modulation unit is configured by a differential capacitively loaded traveling-wave electrode structure based on an SS line configuration, phase modulation units of adjacent channels are spaced apart from each other by 400 μm or more, a distance between main signal lines of the capacitance loading type structure is 60 μm or less, a DC phase adjustment electrode and a PAD are provided between an I side phase modulation unit and a Q side phase modulation unit, the DC phase adjustment electrode is spaced apart by at least 80 μm or more from a signal line of the phase adjustment unit, and a crosstalk characteristic between the adjacent channels is −30 dB or less in a required frequency band.