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

Upsampling01:22

Upsampling

744
Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral replicas at intervals dictated by the new Nyquist frequency. To refine this zero-inserted sequence, it is passed through a lowpass filter with a cutoff...
744
Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

9.1K
Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
9.1K
Bandpass Sampling01:17

Bandpass Sampling

678
In signal processing, bandpass sampling is an effective technique for sampling signals that have most of their energy concentrated within a narrow frequency band. This type of signal is known as a bandpass signal. The key principle of bandpass sampling involves sampling the signal at a rate that is greater than twice the signal's bandwidth to prevent aliasing.
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2....
678
Aliasing01:18

Aliasing

942
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...
942
Downsampling01:20

Downsampling

868
When considering a sampled sequence with zero values between sampling instants, one can replace it by taking every N-th value of the sequence. At these integer multiples of N, the original and sampled sequences coincide. This process, known as decimation, involves extracting every N-th sample from a sequence, thereby creating a more efficient sequence.
The Fourier transform of the decimated sequence reveals a combination of scaled and shifted versions of the original spectrum. This...
868

You might also read

Related Articles

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

Sort by
Same author

Temporal locking of pulses in injection locked oscillators.

Scientific reports·2025
Same author

Free-space optical communication link using a single Laguerre-Gaussian beam with tunable radial and azimuthal spatial indices generated by an integrated concentric circular antenna array.

Optics express·2024
Same author

Management and outcomes in pulmonary arterial hypertension patients with sepsis.

BMC pulmonary medicine·2024
Same author

Safety and activity of anti-CD14 antibody IC14 (atibuclimab) in ALS: Experience with expanded access protocol.

Muscle & nerve·2022
Same author

Diamond-based microwave quantum amplifier.

Science advances·2022
Same author

Utilizing multiplexing of structured THz beams carrying orbital-angular-momentum for high-capacity communications.

Optics express·2022
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

Related Experiment Video

Updated: Apr 27, 2026

Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

10.1K

Optical under-sampling by using a broadband optical comb with a high average power.

Alexander Sherman, Moshe Horowitz, Shlomo Zach

    Optics Express
    |July 1, 2014
    PubMed
    Summary
    This summary is machine-generated.

    We developed a novel photonic-assisted analog-to-digital converter (ADC) using a smooth optical comb for under-sampling. This method enhances signal energy and improves the signal-to-noise ratio without sacrificing bandwidth.

    More Related Videos

    Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
    08:48

    Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

    Published on: November 22, 2019

    7.0K
    Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
    07:42

    Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

    Published on: December 15, 2021

    2.5K

    Related Experiment Videos

    Last Updated: Apr 27, 2026

    Quasi-light Storage for Optical Data Packets
    07:45

    Quasi-light Storage for Optical Data Packets

    Published on: February 6, 2014

    10.1K
    Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
    08:48

    Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

    Published on: November 22, 2019

    7.0K
    Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
    07:42

    Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

    Published on: December 15, 2021

    2.5K

    Area of Science:

    • Photonics
    • Electrical Engineering
    • Signal Processing

    Background:

    • Photonic-assisted analog-to-digital converters (ADCs) typically use pulsed optical sources for under-sampling.
    • Existing methods face limitations in signal energy and signal-to-noise ratio (SNR) without compromising bandwidth.

    Purpose of the Study:

    • To introduce a new method for improving photonic-assisted ADC performance.
    • To enhance the signal energy and SNR of ADCs through a novel optical under-sampling technique.

    Main Methods:

    • Utilized a broadband phase-locked optical comb with a smooth periodic intensity function for under-sampling.
    • Generated the optical comb by mixing signals from two dielectric resonator oscillators in a Mach-Zehnder modulator.
    • Experimentally demonstrated electro-optical under-sampling with a 4 GHz comb spacing and >48 GHz bandwidth.

    Main Results:

    • Achieved a 6-dB bandwidth of 38.5 GHz and a spur-free dynamic range (SFDR) of 99 dB/Hz(2/3) at 35.8 GHz carrier frequency.
    • Demonstrated a significant improvement in SFDR compared to pulsed optical sources (94 dB/Hz(2/3) at 6.2 GHz).
    • Measured ultra-low temporal jitter of the optical comb at approximately 15 fs and 11 fs.

    Conclusions:

    • The proposed method using a smooth optical comb effectively improves photonic-assisted ADC performance.
    • This technique offers enhanced SNR and maintains system bandwidth, outperforming traditional pulsed sources.
    • The demonstrated system shows potential for high-performance electro-optical signal processing.