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

Cut-off Frequency of BJT

Cut-off Frequency of BJT

Cut-off frequencies in Bipolar Junction Transistors (BJTs) mark the transition between the signal's pass band and stop band, influencing their performance in amplifying or attenuating frequencies. These frequencies are crucial for designing BJTs to meet specific operational requirements in electronic circuits.
Alpha Cut-Off Frequency: Pertinent to the common-base configuration, the alpha cut-off frequency defines the upper-frequency limit at which the current gain, alpha, remains stable. As...

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...

Voltage Dividers

Voltage Dividers

In electrical circuits, resistors can be connected in series, sequentially linked one after the other. In a series configuration, the same current flows through each resistor. Ohm's law is a fundamental principle to understand the behavior of resistors in series. It expresses the voltage across these resistors in terms of the current and resistance.
Kirchhoff's voltage law implies that the sum of the voltages across the resistors in series equals the source voltage. This means that the current...

MOSFET Amplifiers

MOSFET Amplifiers

The MOSFET, when operating in its active region, functions as a voltage-controlled current source. In this region, the gate-to-source voltage controls the drain current. This principle underlies the operation of the transconductance MOSFET amplifier. The output current is directed through a load resistor to convert this amplifier into a voltage amplifier. The output voltage is then obtained by subtracting the voltage drop across the load resistance from the supply voltage. This process results...

MOSFET: Enhancement Mode

MOSFET: Enhancement Mode

Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...

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.

You might also read

Related Articles

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

Sort by

Same author

Controllable protein assembly: from design strategies to functional applications.

Chemical communications (Cambridge, England)·2026

Same author

Nonlinear periodic orbit solutions and their bifurcation structure at the origin of soliton hopping in coupled microresonators.

Communications physics·2026

Same author

NIR-II Light-Modulated Smart Drug Delivery System Utilizing Drug-Gated Nanocomposite Hydrogel for Boosting Anticancer Efficacy.

Polymer science & technology (Washington, D.C.)·2026

Same author

High-pulse-energy integrated mode-locked laser using a Mamyshev oscillator.

Nature·2026

Same author

Dual pH- and Concentration-Dependent K<sup>+</sup> Transporter with Auto-Regulation and Anticancer Activity.

JACS Au·2026

Same author

An Efficient Artificial Light-Harvesting System Constructed Based on Host-Guest Interactions in Aqueous Environment for Photocatalytic Dehalogenation Reactions.

Chemistry (Weinheim an der Bergstrasse, Germany)·2026

Search research articles

Related Experiment Video

Updated: Dec 7, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Frequency division using a soliton-injected semiconductor gain-switched frequency comb.

Wenle Weng¹, Aleksandra Kaszubowska-Anandarajah², Junqiu Liu³

¹Laboratory of Photonics and Quantum Measurements (LPQM), Swiss Federal Institute of Technology Lausanne (EPFL), CH-1015 Lausanne, Switzerland. wenle.weng@epfl.ch anandara@tcd.ie tobias.kippenberg@epfl.ch.

Science Advances

|September 26, 2020

Summary

This study presents a novel technique for generating ultralow-noise microwaves by merging two compact frequency combs. This chip-scale integration advances optical frequency division for broader applications.

More Related Videos

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

Published on: December 15, 2021

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Related Experiment Videos

Last Updated: Dec 7, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

Published on: December 15, 2021

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Area of Science:

Photonics
Optoelectronics
Microwave Engineering

Background:

Optical frequency combs offer precise frequency synthesis and ultralow-noise microwave generation.
Existing methods often require bulky or complex setups.

Purpose of the Study:

To demonstrate a novel, compact, and potentially fully integrated method for low-noise microwave generation.
To leverage the spectral purity of soliton microcombs for frequency division.

Main Methods:

Combining a soliton microcomb and a semiconductor gain-switched comb.
Utilizing a semiconductor laser injection-locked to microresonator solitons.
Implementing a novel frequency division technique.

Main Results:

Successful generation of low-noise microwaves via a new frequency division technique.
Transfer of spectral purity from a dissipative soliton oscillator to subharmonic frequencies.
Dense optical spectral emissions from the gain-switched comb dividing the microcomb line spacing.

Conclusions:

The merger of compact, chip-scale frequency comb devices offers a promising pathway for advanced microwave generation.
This integrated approach could significantly broaden the applications of frequency comb technology.