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Related Concept Videos

Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

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The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
975

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Related Experiment Video

Updated: Oct 31, 2025

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles
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Mode division multiplexing for multiple particles noncontact simultaneous trap.

Yaxun Zhang, Yu Zhou, Xiaoyun Tang

    Optics Letters
    |July 1, 2021
    PubMed
    Summary

    This study introduces a novel fiber-optic trap capable of simultaneously holding two microparticles axially using mode division multiplexing. This innovation simplifies particle manipulation for various scientific applications.

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    Area of Science:

    • Optics and Photonics
    • Microparticle Manipulation
    • Fiber Optics

    Background:

    • Conventional optical traps often face limitations in manipulating multiple particles simultaneously.
    • Precise control over microparticles is crucial for advancements in biophysics, soft matter, and colloidal science.

    Purpose of the Study:

    • To propose and demonstrate a novel fiber-optic trap for simultaneous axial trapping of two microparticles.
    • To leverage mode division multiplexing (MDM) technology for enhanced particle manipulation capabilities.

    Main Methods:

    • Design and fabrication of a tapered single-mode fiber (SMF) probe.
    • Excitation of the LP11 mode beam through offset-doping a 980 nm SMF.
    • Utilizing the first trapped microparticle as a lens to trap a second particle via the LP01 mode beam.

    Main Results:

    • Successful simultaneous axial trapping of two microparticles demonstrated via simulation.
    • The tapered fiber probe effectively generates the necessary optical modes for trapping.
    • The first particle acts as a micro-lens, enabling the trapping of the second particle.

    Conclusions:

    • The proposed fiber-optic trap offers a simplified method for manipulating individual particles for comparative studies.
    • This technology has the potential to significantly advance research in biological, biophysical, colloidal, and soft matter fields.