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Updated: May 25, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

10 GHz pulse source for 640 Gbit/s OTDM based on phase modulator and self-phase modulation.

Hao Hu¹, Hans Christian Hansen Mulvad, Christophe Peucheret

¹DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads, Building 343, DK-2800 Kgs. Lyngby, Denmark. huhao@fotonik.dtu.dk

|January 26, 2012

Summary

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NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.

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We developed a high-quality, cavity-free 10 GHz optical pulse source for high-speed data transmission. This novel pulse source enables error-free 640 Gbit/s data generation and demultiplexing, confirming its superior performance.

Area of Science:

Photonics and Optical Communications
Nonlinear Optics
High-Speed Data Transmission

Background:

Generating high-quality optical pulses is crucial for advancing high-speed optical communication systems.
Existing methods often require complex cavities or suffer from limitations in pulse quality and tunability.

Purpose of the Study:

To demonstrate a novel cavity-free optical pulse source.
To achieve high-quality, tunable optical pulses at 10 GHz for advanced communication experiments.

Main Methods:

Utilized a linear pulse compression stage with a phase modulator and dispersive element.
Employed two cascaded polarization-independent nonlinear pulse compression stages using self-phase modulation (SPM) in dispersion-flattened highly nonlinear fibers (DF-HNLF).

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Quasi-light Storage for Optical Data Packets

Quasi-light Storage for Optical Data Packets

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Last Updated: May 25, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Quasi-light Storage for Optical Data Packets

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Integrated the pulse source into a 640 Gbit/s optical time-division multiplexing (OTDM) data generation and demultiplexing experiment.

Main Results:

Generated a high-quality, cavity-free 10 GHz, 680 fs optical pulse source.
Achieved tunable operation over the C-band with negligible pedestal.
Demonstrated error-free bit error rate (BER) performance in a 640 Gbit/s OTDM experiment, confirming the high pulse quality.

Conclusions:

The developed cavity-free pulse source offers a robust and high-performance solution for future optical communication systems.
The combination of linear and nonlinear pulse compression techniques provides excellent pulse quality and tunability.
The successful demonstration in a high-speed OTDM system validates the practical applicability of the pulse source.