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Updated: Jun 25, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

All-optical UWB pulse generation using sum-frequency generation in a PPLN waveguide.

Jian Wang¹, Qizhen Sun, Junqiang Sun

¹Wuhan National Laboratory for Optoelectronics, College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China. jwang@mail.hust.edu.cn

|March 5, 2009

Summary

This summary is machine-generated.

We demonstrate a new method for optically generating ultrawideband (UWB) monocycle pulses using sum-frequency generation in a PPLN waveguide. This technique successfully produces polarity-inverted UWB pulses meeting FCC standards.

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Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

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Last Updated: Jun 25, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Area of Science:

Photonics and Optics
Nonlinear Optics
Waveguide Technology

Background:

Ultrawideband (UWB) monocycle pulse generation is crucial for high-speed communication and sensing.
Existing methods for UWB pulse generation face limitations in efficiency and spectral control.

Purpose of the Study:

To propose and demonstrate a novel optical approach for generating ultrawideband (UWB) monocycle pulses.
To leverage the parametric attenuation effect of sum-frequency generation (SFG) for UWB pulse creation.

Main Methods:

Utilizing a periodically poled lithium niobate (PPLN) waveguide for SFG.
Modifying a continuous-wave pump into a dark optical pulse pump with undershoot via SFG.
Combining the input signal with the modified pump pulse, with precise time delay, to generate UWB monocycle pulses.

Main Results:

Successfully generated ultrawideband (UWB) monocycle pulses optically.
Observed the SFG process converting the CW pump into a dark optical pulse with undershoot.
Obtained pairs of polarity-inverted UWB monocycle pulses meeting U.S. FCC part 15 definition.

Conclusions:

The proposed SFG-based method offers a novel and effective way to optically generate UWB monocycle pulses.
The technique demonstrates the potential for creating UWB signals with controlled polarity and adherence to regulatory standards.
This approach opens avenues for advanced UWB systems in telecommunications and radar applications.