Off quadrature biasing of mach zehnder modulator for improved OSNR performance
US9612457B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2016 |
| Grant date | Apr 4, 2017 |
| Priority date | — |
| Expiry date | Nov 10, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/4012
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An integrated optical modulator device. The device can include a driver module coupled to an optical modulator. The optical modulator is characterized by a raised cosine transfer function. This optical modulator can be coupled to a light source and a bias control module, which is configured to apply an off-quadrature bias to the optical modulator. This bias can be accomplished by applying an inverse of the modulator transfer function to the optical modulator in order to minimize a noise variance. This compression function can result in an optimized increased top eye opening for a signal associated with the optical modulator. Furthermore, the optical modulator can be coupled to an EDFA (Erbium Doped Fiber Amplifier) that is coupled to a filter coupled an O/E (Optical-to-Electrical) receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.