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

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

890
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.
890
Time and frequency -Domain Interpretation of Phase-lag Control01:21

Time and frequency -Domain Interpretation of Phase-lag Control

139
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...
139
Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

124
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...
124
Aliasing01:18

Aliasing

200
Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...
200
Linear Approximation in Frequency Domain01:26

Linear Approximation in Frequency Domain

128
Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
128
IR Frequency Region: Fingerprint Region01:03

IR Frequency Region: Fingerprint Region

1.0K
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...
1.0K

You might also read

Related Articles

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

Sort by
Same author

Compact dual-comb time-transfer and ranging for future space-based distributed sensing.

Applied optics·2025
Same author

Removing biases in dual frequency comb spectroscopy due to digitizer nonlinearity.

Optics express·2023
Same author

Quantum-limited optical time transfer for future geosynchronous links.

Nature·2023
Same author

Collinear opto-optical loss modulation for carrier-envelope offset stabilization of a fiber frequency comb.

Optics express·2022
Same author

Optical timing jitter due to atmospheric turbulence: comparison of frequency comb measurements to predictions from micrometeorological sensors.

Optics express·2020
Same author

External serrodyne modulation for the suppression of low-frequency noise in quadrature interferometry.

Optics letters·2020

Related Experiment Video

Updated: Aug 26, 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

The time-programmable frequency comb and its use in quantum-limited ranging.

Emily D Caldwell1,2, Laura C Sinclair3, Nathan R Newbury4

  • 1National Institute of Standards and Technology (NIST), Boulder, CO, USA.

Nature
|October 5, 2022
PubMed
Summary

Researchers developed an agile programmable frequency comb, enhancing precision in sensing. This innovation allows for quantum-limited sensitivity and significantly reduces power requirements for applications like ranging.

More Related Videos

Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

10.9K
Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

17.1K

Related Experiment Videos

Last Updated: Aug 26, 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
Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

10.9K
Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

17.1K

Area of Science:

  • Quantum optics
  • Laser physics
  • Metrology

Background:

  • Frequency comb lasers are essential tools for precise measurements in time, frequency, and distance.
  • Current applications are limited by the fixed output of traditional combs, hindering quantum-limited sensitivity.

Purpose of the Study:

  • To introduce an agile, programmable frequency comb with digitally controlled pulse timing and phase.
  • To enable quantum-limited sensitivity in sensing applications by overcoming limitations of rigid frequency combs.

Main Methods:

  • Digital control of pulse time and phase with ±2-attosecond accuracy.
  • Configuring the programmable comb to coherently track weak returning pulse trains.
  • Demonstration in a ranging system comparing power requirements to conventional dual-comb systems.

Main Results:

  • Achieved quantum-limited sensitivity in sensing applications.
  • Reduced power requirements for ranging by approximately 5,000-fold compared to dual-comb systems.
  • Enabled ranging at a mean photon per pulse number of 1/77 while maintaining high accuracy and precision.

Conclusions:

  • The agile programmable frequency comb offers enhanced capabilities for sensing and metrology.
  • This technology overcomes previous trade-offs associated with rigid frequency comb outputs.
  • Potential applications span ranging, imaging, spectroscopy, and advanced experimental techniques.