Optical N-level quadrature amplitude modulation (NQAM) generation based on phase modulator
US10498458B2 · kind B2 · utility
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Key dates
| Filing date | Nov 3, 2016 |
| Grant date | Dec 3, 2019 |
| Priority date | — |
| Expiry date | Sep 3, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/541
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical modulator for generating quadrature amplitude modulation (nQAM) and phase-shift keying (nPSK) signals with tunable modulation efficiency. The modulator includes a controlling circuit for adjusting the modulation efficiency or modulation depth of the modulator by controlling the direct current (DC) bias.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.