Patent · US Active

Temperature feedback for electro-optic phase-shifters

US10598968B2 · kind B2 · utility

2Cited by

3References

20Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Behnam Behroozpour · Foster City, US
Pedram Lajevardi · Menlo Park, US
Jan Niklas Caspers · Stuttgart, DE

Key dates

Filing date	Dec 12, 2018
Grant date	Mar 24, 2020
Priority date	—
Expiry date	Dec 12, 2038

Classification

Technology area (CPC G)Physics
CPC primaryG02F2203/50
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A transmitter for an optical device includes semi-conductor waveguides, each incorporating an electro-optic phase-shifter in the semi-conductor waveguide that is operable to change the refractive index of the waveguide to thereby introduce a phase shift in the light propagated through the waveguide. The electro-optic is connected to a phase shift controller and to a temperature measurement component, such as a PTAT circuit, that is integrated into the electronic or photonic chip carrying the waveguide. Temperature measurement by the measurement component can be multiplexed with the normal operation of the phase-shifter so that the temperature measurement function does not interfere with the phase shifting function.

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