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

You might also read

Related Articles

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

Sort by
Same author

Massive-scale spatial multiplexing of multimode VCSELs with a 3D-printed photonic lantern.

Nature communications·2026
Same author

Spatial mode conversion of single photons at the C-band using in fiber long-period gratings.

Scientific reports·2025
Same author

Simultaneous 2-photon and 3-photon excitation with a red fluorescent protein-cyanine dye probe pair in the 1700-nm excitation window for deep <i>in vivo</i> neurovascular imaging.

Biomedical optics express·2024
Same author

Direct 3D-printed ring-resonator photonic circuit on a dual core fiber tip for remote sensing applications.

Optics letters·2024
Same author

Free-standing microscale photonic lantern spatial mode (De-)multiplexer fabricated using 3D nanoprinting.

Light, science & applications·2024
Same author

Mitigating probe pulse deformation in Raman amplification in OTDR fiber sensing systems.

Optics express·2023

Related Experiment Video

Updated: Apr 18, 2026

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

8.1K

Variable optical attenuator and dynamic mode group equalizer for few mode fibers.

Miri Blau, Israel Weiss, Jonathan Gerufi

    Optics Express
    |January 22, 2015
    PubMed
    Summary

    A novel variable optical attenuator (VOA) using a spatial light modulator (SLM) offers precise control over multi-mode fiber signals. This technology enables dynamic mode-group equalization for optical amplification systems.

    More Related Videos

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
    09:43

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

    Published on: March 20, 2017

    10.4K
    Quasi-light Storage for Optical Data Packets
    07:45

    Quasi-light Storage for Optical Data Packets

    Published on: February 6, 2014

    11.4K

    Related Experiment Videos

    Last Updated: Apr 18, 2026

    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

    8.1K
    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
    09:43

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

    Published on: March 20, 2017

    10.4K
    Quasi-light Storage for Optical Data Packets
    07:45

    Quasi-light Storage for Optical Data Packets

    Published on: February 6, 2014

    11.4K

    Area of Science:

    • Optical Engineering
    • Photonics
    • Telecommunications

    Background:

    • Mode-dependent loss and gain are significant challenges in multi-mode fiber systems.
    • Existing optical attenuators lack the spatial selectivity needed for mode-group equalization.

    Purpose of the Study:

    • To experimentally demonstrate a variable optical attenuator (VOA) for multi-mode fiber.
    • To develop a dynamic mode-group equalizer (DME) for gain-balancing optical amplifiers.

    Main Methods:

    • Utilized an amplitude spatial light modulator (SLM) for spatially selective attenuation.
    • Experimentally tested a three-mode fiber VOA and extended analysis to a six-spatial-mode fiber.

    Main Results:

    • Achieved up to -28dB uniform attenuation for all modes in a three-mode fiber.
    • Demonstrated up to 10dB differential attenuation between mode groups (LP₀₁ and LP₁₁).
    • Identified that spatial mode distribution and overlap limit DME performance in higher-order mode fibers.

    Conclusions:

    • The SLM-based VOA provides a foundation for dynamic mode-group equalization.
    • The developed DME can potentially balance gain in mode-dependent optical amplifiers.
    • Higher mode counts in fibers present challenges for DME dynamic range and performance.