US 2026/0106672 A1 · Single-Sideband Generator Based on Optical Delay Line

Abstract

The present invention provides a single sideband signal generator including a modulator configured to generate a first and a second modulated optical signals which have equal amplitudes but opposite phases; a first optical delay line-based sideband suppressing optical circuit for generating a full-carrier single sideband signal and/or a second optical delay line-based sideband suppressing optical circuit for generating a carrier-suppressed single sideband signal. The present invention simplifies the structure by saving half of the space occupied by the redundant signal electrodes and also reducing the RF power consumption by half by removing the RF hybrid. The provided single sideband signal generator can enable compact, low-cost, and power-efficient SSB signal generation and be easily scaled to higher frequency domains without additional cost by appropriately designing the optical delay line length.

Claims20

Dependent claims

A single sideband signal generator, comprising:

a modulator configured to generate a first and a second modulated optical signals which have equal amplitudes but opposite phases;
and
a sideband suppressing optical circuit including:
a first optical delay line path coupled to the first modulation branch and configured to obtain a first photonic RF phase-shifted optical signal based on the first modulated optical signal;
a first optical bypass line path coupled to second modulation branch and configured to obtain a first bypass optical signal based on the second modulated optical signal;
and
a first optical combiner coupled to the first optical delay line path and the first optical bypass line path and configured to combine the first photonic RF phase-shifted optical signal and the first bypass optical signal to obtain a first full-carrier single sideband signal.

4 more elements

A single sideband signal generator, comprising:

a modulator configured to generate a first and a second modulated optical signals which have equal amplitudes but opposite phases;
a sideband suppressing optical circuit including:
a first optical delay line path coupled to the first modulation branch and configured to obtain a first photonic RF phase-shifted optical signal based on the first modulated optical signal;
a first optical bypass line path coupled to second modulation branch and configured to obtain a first bypass optical signal based on the second modulated optical signal;
a second optical delay line path coupled to the second modulation branch and configured to obtain a second photonic RF phase-shifted optical signal based on the second modulated optical signal;
a second optical bypass line path coupled to first modulation branch and configured to obtain a second bypass optical signal based on the first modulated optical signal;
and
an optical combining circuit configured to combine the first photonic RF phase-shifted optical signal, the first bypass optical signal, the second photonic RF phase-shifted optical signal and the second bypass optical signal to obtain a carrier-suppressed single sideband signal.

5 more elements

Dependencies are inferred from the claim text.

Single-Sideband Generator Based on Optical Delay Line

Life of this patent

Single-Sideband Generator Based on Optical Delay Line

Life of this patent

Abstract

Claims20