Generation of an optical PAM-4 signal in a Mach-Zehnder modulator
US11630369B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 2021 |
| Grant date | Apr 18, 2023 |
| Priority date | — |
| Expiry date | Aug 18, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/2257
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Embodiments are disclosed for generating an optical Pulse Amplitude Modulation 4-level (PAM-4) signal from bandwidth-limited duobinary electrical signals in a Mach-Zehnder modulator. An example system includes an MZM structure that comprises a first waveguide interferometer arm structure associated with a first semiconductor device and a second waveguide interferometer arm structure associated with a second semiconductor device. A polybinary electrical signal is applied to or between the first semiconductor device and the second semiconductor device to convert an input optical signal provided to the MZM structure into an optical PAM-4 signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.