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Updated: Apr 11, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Electro-optic millimeter-wave harmonic downconversion and vector demodulation using cascaded phase modulation and

Vincent R Pagán, Thomas E Murphy

|June 2, 2015

Summary

This summary is machine-generated.

This study presents an electro-optic method for simultaneously downconverting and demodulating millimeter-wave signals. The technique enables efficient signal processing for high-frequency communications.

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Last Updated: Apr 11, 2026

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Quasi-light Storage for Optical Data Packets

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Area of Science:

Photonics
Electrical Engineering
Signal Processing

Background:

Millimeter-wave (mmWave) communication systems face challenges in signal processing due to high frequencies.
Existing downconversion and demodulation techniques can be complex and costly.

Purpose of the Study:

To introduce a novel electro-optic technique for simultaneous downconversion and demodulation of vector-modulated mmWave signals.
To demonstrate the system's capability for harmonic downconversion and vector demodulation.

Main Methods:

Utilizing electro-optic phase modulation to downconvert radio frequency (RF) signals.
Employing optical filtering for harmonic downconversion to intermediate frequencies (IF) or baseband.
Demonstrating vector demodulation of Quadrature Phase Shift Keying (QPSK) and 16-Quadrature Amplitude Modulation (16-QAM) signals.

Main Results:

Successfully demonstrated downconversion of RF signals from 7 to 70 GHz to IFs below 20 GHz.
Achieved harmonic downconversion and vector demodulation of 2.5-Gb/s QPSK and 5-Gb/s 16-QAM signals at 40 GHz carrier frequencies to baseband.
Validated the electro-optic technique's effectiveness for high-speed, high-frequency signal processing.

Conclusions:

The developed electro-optic technique offers a viable solution for efficient mmWave signal processing.
This method simplifies the downconversion and demodulation process, paving the way for advanced wireless communication systems.
The demonstrated capabilities support the advancement of high-capacity, high-frequency communication technologies.