Phase control optical FSK modulator
US7957653B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2006 |
| Grant date | Jun 7, 2011 |
| Priority date | — |
| Expiry date | Dec 7, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/0316
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
There is provided an optical modulator capable of controlling the phase of a USB signal and the phase of an LSB signal of an optical FSK modulated signal. A modulation signal is applied to a main Mach-Zehnder electrode (or an electrode C) (11) of a main Mach-Zehnder waveguide (MZC) (8) to switch the USB signal and the LSB signal, and so FSK modulation can be made. In order to control the phase of the optical signal to be outputted from the main Mach-Zehnder waveguide (MZC) (8), bias voltage is applied to the main Mach-Zehnder electrode (11), and the phases of the USB signal and the LSB signal are controlled. By doing so, FSK modulation with adjusted phases can be performed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.