Fabrikationsrobuster Optischer Wellenleitermodulator

Details

Veröffentlichungs-Nr.

EP4756526

Anmeldetag

4. Dezember 2025

Veröffentlichung

10. Juni 2026

Rechtsraum

EP

IPC

G02F1/21, G02F1/225

Abstract

A photonic integrated circuit for modulating light includes an electro-optic modulator disposed along a top surface of a substrate. The electro-optic modulator includes an optical waveguide segment connected between two optical waveguide loop mirrors. At least one of the two optical waveguide loop mirrors includes a Mach-Zehnder modulator (MZM) having a pair of 2x2 optical couplers at opposite ends thereof to couple light in and out of the MZM, one of the 2x2 couplers being terminated by a waveguide loop. Substituting MZI tuning circuits comprising a thermal tuner connected in series between two directional couplers for the 2x2 optical couplers can compensate for coupler fabrication errors that may affect power splitting, ensuring a near perfect 50:50 power splitting ratio thus enabling improvements in both modulation voltage and modulation bandwidth.

Anmelder

Firma

Nokia Solutions and Networks Oy

Land

🇫🇮 Finnland