Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Transmission Line Design Considerations01:23

Transmission Line Design Considerations

131
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...
131
Propagation Speed of Electromagnetic Waves01:30

Propagation Speed of Electromagnetic Waves

3.3K
Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
3.3K
Energy Stored In A Coaxial Cable01:31

Energy Stored In A Coaxial Cable

1.4K
A coaxial cable consists of a central copper conductor used for transmitting signals, followed by an insulator shield, a metallic braided mesh that prevents signal interference, and a plastic layer that encases the entire assembly.
In the simplest form, a coaxial cable can be represented by two long hollow concentric cylinders in which the current flows in opposite directions. The magnetic field inside and outside the coaxial cable is determined by using Ampère's law. The magnetic...
1.4K
Intensity Of Electromagnetic Waves01:22

Intensity Of Electromagnetic Waves

4.4K
The energy transport per unit area per unit time, or the Poynting vector, gives the energy flux of an electromagnetic wave at any specific time. For a plane electromagnetic wave with E0 and B0 as the peak electric and magnetic fields and traveling along the x-axis, the time-varying energy flux can be given by the following equation:
4.4K
Maximum Power Transfer01:16

Maximum Power Transfer

239
Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...
239
Speed of a Transverse Wave01:13

Speed of a Transverse Wave

1.5K
The speed of a wave depends on the characteristics of the medium. For example, in the case of a guitar, the strings vibrate to produce the sound. The speed of the waves on the strings and the wavelength determine the frequency of the sound produced. The strings on a guitar have different thicknesses but may be made of similar material. They have different linear densities, and the linear density is defined as the mass per length.
One of the key properties of any wave is the wave speed. Light...
1.5K

You might also read

Related Articles

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

Sort by
Same author

Dual-pilot phase recovery with pair-wise maximum-ratio combining for coherent PONs.

Optics letters·2026
Same author

Diagnostic value of the myocardial performance index and doppler parameters in detecting fetal growth restriction in pregnancies complicated by hypertensive disorders.

Quantitative imaging in medicine and surgery·2026
Same author

Two stable gut microbiome guilds predict liver tumor class and treatment responses.

iMeta·2026
Same author

Polarization dependent emission characteristics of Rayleigh scattering in nanoparticle-doped optical fibers.

Optics express·2026
Same author

Dispersion-tuned mode-locked optoelectronic oscillator.

Optics letters·2026
Same author

Integrating fixed and mobile coherent optical access networks for unified broadband services.

Communications engineering·2026

Related Experiment Video

Updated: Jun 14, 2025

Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

10.8K

12.1 terabit/second data center interconnects using O-band coherent transmission with QD-MLL frequency combs.

Santiago Bernal1, Mario Dumont2, Essam Berikaa3

  • 1Department of Electrical and Computer Engineering, McGill University, Montreal, QC, H3A 0G4, Canada. Santiago.Bernal@mail.mcgill.ca.

Nature Communications
|September 4, 2024
PubMed
Summary

This study introduces an O-band coherent optical system using Quantum Dot-Mode Locked Lasers (QD-MLLs) for data center interconnects. The system achieves 12.1 Tbps over 10km, offering a scalable and cost-effective solution.

More Related Videos

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

8.9K
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

14.5K

Related Experiment Videos

Last Updated: Jun 14, 2025

Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

10.8K
Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

8.9K
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

14.5K

Area of Science:

  • Optical communications
  • Data center interconnects
  • Quantum dot lasers

Background:

  • Current data center interconnects (DCI) predominantly use intensity modulation direct detection (IMDD) due to simplicity and cost.
  • However, IMDD faces scaling limitations, making coherent solutions viable for short-reach applications.

Purpose of the Study:

  • To present an O-band coherent optical fiber transmission system utilizing Quantum Dot-Mode Locked Lasers (QD-MLLs).
  • To explore the potential of coherent technology for enhancing data center interconnect capacity, reducing power consumption, complexity, and cost.

Main Methods:

  • Implementation of a comb-to-comb configuration with two independent free-running QD-MLLs for carrier and Local Oscillator (LO).
  • Demonstration of a 10 km single-mode fiber transmission in the O-band.
  • Utilizing 26 comb lines, a 56 GBaud symbol rate, and 32 Quadrature Amplitude Modulation (QAM).

Main Results:

  • Achieved a total system capacity of 12.1 Tbps, with a spectral efficiency of 0.47 Tbps/λ.
  • Demonstrated a heterodyne coherent system operating in the O-band.
  • Quantified optimal comb line spacing for the specific use case through design, analysis, and experimentation.

Conclusions:

  • The developed O-band coherent system offers a promising alternative to IMDD for data center interconnects.
  • The system demonstrates higher capacity and spectral efficiency compared to existing C-band systems using fewer comb lines and higher modulation formats.
  • The study provides insights into optimizing configurations for future high-capacity, low-power, and cost-effective data center interconnect solutions.