US 2026/0230368 A1 · INTERFEROMETRIC PAM MODULATION

Abstract

Interferometric modulators are described, including modulators capable of PAM modulation. An example interferometric modulator includes a generator configured to generate a carrier wave, a modulator coupled to the generator and having a first modulator arm and a second modulator arm, and a driver. The driver can be configured to generate a first bias control signal for phase modulation of the carrier wave in the first modulator arm based on a more significant bit of a data signal and to generate a second bias control signal for modulation of the carrier wave in the second modulator arm based on a less significant bit of the data signal. The interferometric modulators described herein can be designed to implement a number of different transfer functions based on different types of phase shifts, effective path lengthening, or effective path shortening in the first and second modulator arms.

Claims20

Dependent claims

A modulator system comprising:

a generator configured to generate a carrier wave;
a modulator coupled to the generator and comprising a first modulator arm and a second modulator arm;
and
a driver configured to:
generate a first bias control signal for phase modulation of the carrier wave in the first modulator arm based on a more significant bit of a data signal;
and
generate a second bias control signal for modulation of the carrier wave in the second modulator arm based on a less significant bit of the data signal.

4 more elements

Dependencies are inferred from the claim text.

Interferometric pam modulation

Life of this patent

Interferometric pam modulation

Life of this patent

Abstract

Claims20