In-service skew monitoring in a nested Mach-Zehnder modulator structure using pilot signals and balanced phase detection
US9705592B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2016 |
| Grant date | Jul 11, 2017 |
| Priority date | — |
| Expiry date | Apr 5, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2210/075
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus is provided. The apparatus may include a drive circuit that selectively supplies a first plurality of electrical signals and a second plurality of electrical signals to a modulation circuit. Based on the first plurality of electrical signals, the modulation circuit may output a first in-phase component being modulated in accordance with a first tone having a first frequency and a first quadrature component being modulated in accordance with a second tone having a second frequency different than the first frequency. Based on the second plurality of electrical signals, the modulation circuit may output a second optical signal having a second in-phase component being modulated in accordance with the second tone and a second quadrature component being modulated in accordance with the first tone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.