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

Fiber Reinforced Concrete01:22

Fiber Reinforced Concrete

129
Fiber-reinforced concrete significantly enhances the structural and nonstructural properties of traditional concrete by incorporating fibers like steel, glass, and polymers. These fibers, varying from natural ones such as sisal and cellulose to manufactured ones like polypropylene and Kevlar, are mixed into hydraulic cement with aggregates. Steel fibers, often preferred for their robustness, contribute to improved ductility, toughness, and post-cracking performance. The concrete is classified...
129
Carrier Generation and Recombination01:22

Carrier Generation and Recombination

783
Carrier generation is the process by which electron-hole pairs (EHPs) are created within the semiconductor. In direct-bandgap semiconductors, such as gallium arsenide (GaAs), this occurs efficiently when energy absorption prompts valence electrons to leap into the conduction band, leaving behind holes.
This process is given by the generation rate G and is efficient due to the conservation of momentum between the valence band maximum and conduction band minimum.
Indirect generation involves an...
783
Generating Electromagnetic Radiations01:10

Generating Electromagnetic Radiations

3.8K
The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in...
3.8K
IR Frequency Region: Fingerprint Region01:03

IR Frequency Region: Fingerprint Region

1.1K
IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...
1.1K
Construction of Frequency Distribution01:15

Construction of Frequency Distribution

8.1K
A frequency distribution table can be constructed using the steps given below.
First, make a table with two columns—one with the title of the data that needs to be organized, and the other column for frequency. [Draw a third column for tally marks if needed]. Then, take a look at the items given in the data set and decide if an ungrouped frequency distribution table or a grouped frequency distribution table would be more suitable. If there are large sets of different values, then it is...
8.1K
Continuous -time Fourier Transform01:11

Continuous -time Fourier Transform

403
The Fourier series is instrumental in representing periodic functions, offering a powerful method to decompose such functions into a sum of sinusoids. This technique, however, necessitates modification when applied to nonperiodic functions. Consider a pulse-train waveform consisting of a series of rectangular pulses. When these pulses have a finite period, they can be accurately represented by a Fourier series. Yet, as the period approaches infinity, resulting in a single, isolated pulse, the...
403

You might also read

Related Articles

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

Sort by
Same author

WDM-enabled multi-core parallel programmable photonic signal processor.

Nature communications·2026
Same author

Ultra-low-noise supercontinuum in normal-dispersion ZBLAN fibers pumped at 1.85 µm.

Optics letters·2026
Same author

Efficient Tm-doped silica fiber laser incorporating nanoparticle doping.

Optics express·2026
Same author

High-temperature behavior of femtosecond FBGs in molten-core glass optical fibers.

Optics letters·2026
Same author

Monitoring and Control of the Direct Energy Deposition (DED) Additive Manufacturing Process Using Deep Learning Techniques: A Review.

Materials (Basel, Switzerland)·2026
Same author

Ultra-broadband near- to mid-infrared electro-optic modulator on thin-film lithium niobate.

Nature communications·2026

Related Experiment Video

Updated: Sep 5, 2025

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

9.1K

All-fibre heterogeneously-integrated frequency comb generation using silicon core fibre.

Ronit Sohanpal1, Haonan Ren2,3, Li Shen4

  • 1Optical Networks Group, Department of Electronic and Electrical Engineering, University College London, London, UK. ronit.sohanpal.14@ucl.ac.uk.

Nature Communications
|July 9, 2022
PubMed
Summary

Researchers developed a compact, all-fibre optical frequency comb source. This silicon core fiber device offers a flat spectrum and high power for telecommunications and spectroscopy applications.

More Related Videos

In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
09:39

In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation

Published on: May 27, 2013

12.5K
Writing Bragg Gratings in Multicore Fibers
08:48

Writing Bragg Gratings in Multicore Fibers

Published on: April 20, 2016

8.2K

Related Experiment Videos

Last Updated: Sep 5, 2025

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

9.1K
In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
09:39

In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation

Published on: May 27, 2013

12.5K
Writing Bragg Gratings in Multicore Fibers
08:48

Writing Bragg Gratings in Multicore Fibers

Published on: April 20, 2016

8.2K

Area of Science:

  • Photonics and Optical Engineering
  • Materials Science
  • Telecommunications

Background:

  • Optical frequency combs (OFCs), initially for metrology, are expanding into optical communications, spectroscopy, and signal processing.
  • Emerging applications demand compact, temperature-stable OFC sources with flat spectra, high per-tone power, narrow linewidth, and high optical signal-to-noise ratio (OSNR).

Purpose of the Study:

  • To report the generation of a flat, high-power optical frequency comb in the telecom band.
  • To demonstrate a compact, all-fibre, cavity-free OFC source suitable for demanding applications.

Main Methods:

  • Utilized a 17 mm fully-integrated silicon core fiber as a parametric mixer.
  • Employed an all-fibre, cavity-free design combining planar waveguide benefits with fiber platform advantages.

Main Results:

  • Generated a 30 nm bandwidth frequency comb source containing 143 tones.
  • Achieved a spectral flatness of 12 dB across the entire region.
  • Demonstrated a linewidth of less than 3 kHz and an optical signal-to-noise ratio (OSNR) greater than 30 dB.

Conclusions:

  • The developed silicon core fiber OFC source meets critical application demands for compactness and spectral quality.
  • This all-fibre, cavity-free approach offers a promising solution for advanced optical communications and spectroscopy.