Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Time and frequency -Domain Interpretation of Phase-lag Control

Time and frequency -Domain Interpretation of Phase-lag Control

Phase-lag controllers are widely used in control systems to improve stability and reduce steady-state errors. A dimmer switch controlling the brightness of a light bulb serves as a practical example of phase-lag control, gradually adjusting the bulb's brightness. Mathematically, phase-lag control or low-pass filtering is represented when the factor 'a' is less than 1.
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any finite,...

Time and frequency -Domain Interpretation of Phase-lead Control

Time and frequency -Domain Interpretation of Phase-lead Control

Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...

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.

Line Protection with Impedance Relays

Line Protection with Impedance Relays

Coordinating time-delay overcurrent relays in complex radial systems and directional overcurrent relays in multi-source transmission loops can be challenging. Impedance relays address these issues by responding to the voltage-to-current ratio, specifically measuring the apparent impedance of a line. These relays become more sensitive during faults as current increases and voltage decreases, thereby reducing the apparent impedance.
Under normal conditions, low load currents keep the measured...

Transmission Line Design Considerations

Transmission Line Design Considerations

Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)

When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Integrated setup for time and spatially resolved micro-photoluminescence.

The Review of scientific instruments·2026

Same author

Xanthomatous Giant Cell Renal Cell Carcinoma: Another Morphologic Form of TSC -associated Renal Cell Carcinoma.

The American journal of surgical pathology·2022

Same author

Quantum state features of the FEL radiation from the occupation number statistics.

Optics express·2021

Same author

Rubella vaccine-induced granulomas are a novel phenotype with incomplete penetrance of genetic defects in cytotoxicity.

The Journal of allergy and clinical immunology·2021

Same author

Orofacial Granulomatosis Presenting With Acquired Lymphangiectasia.

JAMA dermatology·2019

Same author

Molecular and clinical characterization of citrin deficiency in a cohort of Chinese patients in Hong Kong.

Molecular genetics and metabolism reports·2018

Same journal

Denoising algorithm of Φ-OTDR systems based on adaptive fractional wavelet transform denoising.

Optics express·2026

Same journal

Millisecond photon-to-photon latency and high-speed volumetric projection system for optogenetics.

Optics express·2026

Same journal

Polarization-encoded coaxial structured light for high-precision 3D surface profilometry.

Optics express·2026

Same journal

Discrete freeform optical design based on collaborative optimization of point cloud and local normals.

Optics express·2026

Same journal

Ultrafast ghost imaging with 25 GHz speckle switching and wavelength-division multiplexing.

Optics express·2026

Same journal

Atomic vapor cells fabricated by femtosecond laser welding of standard-optical-quality glass.

Optics express·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Jun 24, 2026

Quasi-light Storage for Optical Data Packets

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Time-division-multiplexing using pulse position locking for 100 Gb/s applications.

C W Chow¹, A D Ellis, F Parmigiani

¹Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan. cwchow@mail.nctu.edu.tw

|April 15, 2009

Summary

This summary is machine-generated.

We introduce Pulse Position Locking (PPL), a novel method for asynchronous optical packet retiming. This technique effectively resynchronizes high-speed signals and reduces jitter, enabling speeds over 100 Gb/s.

More Related Videos

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Related Experiment Videos

Last Updated: Jun 24, 2026

Quasi-light Storage for Optical Data Packets

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Area of Science:

Optical communications
Signal processing

Background:

High-speed optical communication systems face challenges in clock and data recovery (> 40 Gb/s) and time-division multiplexing (TDM).
Achieving reliable data synchronization and jitter reduction at speeds exceeding 100 Gb/s remains a significant hurdle.

Purpose of the Study:

To propose and numerically analyze a new asynchronous optical packet retimer scheme.
To address the limitations in high-speed clock and data recovery and TDM for future communication technologies.

Main Methods:

Development of an asynchronous optical packet retimer utilizing parabolic or sinusoidal phase modulation.
Integration of linear dispersion within the proposed scheme, termed Pulse Position Locking (PPL).
Numerical simulations to evaluate the performance of the PPL scheme.

Main Results:

The Pulse Position Locking (PPL) scheme effectively resynchronizes optical signals with arbitrary delays to a local clock.
The PPL method demonstrates a significant reduction in input jitter for high-speed signals.
Successful application of the scheme to time-division multiplexing (TDM) signals at 10 Gb/s and 40 Gb/s, achieving rates over 100 Gb/s.

Conclusions:

The proposed asynchronous optical packet retimer based on PPL offers a viable solution for high-speed optical communication challenges.
PPL technology shows promise for enabling future communication systems to exceed 100 Gb/s with improved signal integrity.
This method provides a pathway to overcome current limitations in clock recovery and data synchronization for optical networks.