Patent · US Active

Method and apparatus for stabilization of optical transmitter

US9692518B2 · kind B2 · utility

3Cited by

6References

19Claims

0Family size

Assignee

FINISAR CORPORATION · US

Inventors

Suhas P. Bhandare · Levittown, US
Heider N. Ereifej · Quakertown, US
Kyu Kim · North Wales, US
Mark Colyar

Key dates

Filing date	Jul 17, 2013
Grant date	Jun 27, 2017
Priority date	—
Expiry date	Oct 9, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH04J14/06
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

A DP-QPSK optical transmitter includes an outer MZM comprising a first parent MZM comprising a first child MZM and a second child MZM that modulates a QPSK signal with a first polarization. A second parent MZM includes a first child MZM and a second child MZM that modulates a QPSK signal with a second polarization. The outer Mach-Zehnder modulator multiplexes the first and second polarization embedded into a dual-polarization QPSK signal generation. A first optical detector detects the QPSK signal generated by the first parent MZM with the first polarization. A second optical detector optical detects the QPSK signal generated by the second parent Mach-Zehnder modulator with the second polarization. A bias control circuit generates bias signals on at least one output that stabilize the DP-QPSK signal in response to signals generated by the first and second optical detector using electrical time division multiplexing.

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