Optical modulator
US10598862B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2018 |
| Grant date | Mar 24, 2020 |
| Priority date | — |
| Expiry date | Mar 30, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/225
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided is an optical element module including: a substrate; an optical modulator unit that is formed in the substrate and includes an optical waveguide; a first lens unit that is disposed on an end surface of the substrate, and includes a lens portion at which a signal light beam emitted from the optical modulator unit is collimated; and a second lens unit that introduces the signal light beam passing through the first lens unit to an optical fiber. The optical modulator unit includes a Mach-Zehnder type optical waveguide, a Y-branch coupler of the Mach-Zehnder type optical waveguide includes an output waveguide through which a signal light beam is guided, and a radiated light beam waveguide through which a radiated light beam is guided, and an unnecessary light beam removing unit, which suppresses input of a higher-order mode light beam propagating through the output waveguide or a leaked light beam propagating through the inside of the substrate into the optical fiber through the lens portions of the first lens unit, is provided between the output waveguide and the radiated light beam waveguide in the vicinity of an end of the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.