OPTICAL MODULATOR, SUBSTRATE FOR OPTICAL MODULATOR, METHOD FOR MANUFACTURING OPTICAL MODULATOR, AND METHOD FOR MANUFACTURING SUBSTRATE FOR OPTICAL MODULATOR

• Main Authors: OSAKI SATOSHI, OGAWA KENGO, YOKOTA HIROAKI, KAKIO SHOJI, KURIMOTO KOHEI, YONEUCHI TOSHIFUMI, KAYANO RINZO, KISHIDA KAZUTO
• Format: Patent
• Language: English; Japanese
• Published: 09.04.2020
• Subjects: DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

To provide an optical modulator capable of reducing a propagation loss, a substrate for the optical modulator, a method for manufacturing the optical modulator, and a method for manufacturing the substrate for the optical modulator.SOLUTION: An optical modulator 1 in one embodiment includes: a base substrate 10; a waveguide substrate 20 having an electro-optic effect, which is disposed on the base substrate 10; a waveguide 23 formed on the waveguide substrate 20 for performing optical modulation; and an electrode 40 for applying a voltage to the waveguide 23. Here, the base substrate 10 and the waveguide substrate 20 formed of the same material, the waveguide 23 is formed in the waveguide substrate 20, and a refractive index of the waveguide substrate 20 is larger a refractive index of the base substrate 10.SELECTED DRAWING: Figure 1 【課題】伝搬損失を低減させることができる光変調器、光変調器用基板、光変調器の製造方法及び光変調器用基板の製造方法を提供する。【解決手段】一実施の形態に係る光変調器１は、ベース基板１０；ベース基板１０上に配置された、電気光学効果を有する導波路基板２０；導波路基板２０に形成された、光変調を行うための導波路２３；および導波路２３に電圧を印加するための電極４０を含む。ここで、ベース基板１０および導波路基板２０は、同一の材質からなり、導波路２３は導波路基板２０内に形成され、導波路基板２０の屈折率はベース基板１０の屈折率よりも大きい。【選択図】図１