Direct reference subtraction system for control of optical transmitters
US9191104B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2013 |
| Grant date | Nov 17, 2015 |
| Priority date | — |
| Expiry date | Jan 11, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/0799
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical measurement system configured to determine whether an optical transmitter signal requires calibration is disclosed. In an implementation, the system includes an optical transmitter configured to emit electromagnetic radiation in limited spectrums of wavelengths at amplitudes based upon one or more transmission signals, and an optical sensor configured to detect the electromagnetic radiation in the limited spectrums of wavelengths and to generate a signal in response thereto. The system includes reference current sources configured to generate a respective reference current and a switch configured to transition between a first configuration and a second configuration based upon the transmission signals. The reference currents are configured to subtract from the signal generated by the optical sensor such that a difference remains. A comparison device is configured to compare the difference portion to a reference signal and output a signal indicative of the direction in which an optical transmitter driver signal should be adjusted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.