Patent · US Active

Optical modulator with automatic bias correction

US10234703B2 · kind B2 · utility

1Cited by
12References
17Claims
0Family size

Assignee

Inventor

Key dates

Filing dateMar 24, 2017
Grant dateMar 19, 2019
Priority date—
Expiry dateMar 24, 2037

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04B10/5053
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

An optical modulator uses an optoelectronic phase comparator configured to provide, in the form of an electrical signal, a measure of a phase difference between two optical waves. The phase comparator includes an optical directional coupler having two coupled channels respectively defining two optical inputs for receiving the two optical waves to be compared. Two photodiodes are configured to respectively receive the optical output powers of the two channels of the directional coupler. An electrical circuit is configured to supply, as a measure of the optical phase shift, an electrical signal proportional to the difference between the electrical signals produced by the two photodiodes.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.