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Related Experiment Video

Updated: Jun 22, 2026

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
07:28

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

Published on: August 30, 2012

Tunable hollow waveguide distributed Bragg reflectors with variable air core.

Yasuki Sakurai, Fumio Koyama

    Optics Express
    |June 2, 2009
    PubMed
    Summary
    This summary is machine-generated.

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    We developed a tunable hollow waveguide Bragg reflector. Adjusting the air-core thickness allows for significant shifts in the Bragg wavelength, enabling precise optical filtering applications.

    Area of Science:

    • Photonics and Optical Engineering
    • Waveguide Technology
    • Nanophotonics

    Background:

    • Distributed Bragg reflectors (DBRs) are crucial for wavelength-selective optical devices.
    • Hollow waveguides offer unique properties for light manipulation.
    • Tunability in optical components is essential for advanced photonic systems.

    Purpose of the Study:

    • To demonstrate a novel tunable hollow waveguide distributed Bragg reflector (HWBDR).
    • To investigate the effect of air-core thickness variation on Bragg wavelength.
    • To achieve wavelength tuning in a fabricated HWBDR.

    Main Methods:

    • Modeling of a grating-loaded slab hollow waveguide with a variable air-core.
    • Fabrication of a SiO2 slab hollow waveguide Bragg reflector with a 1st-order circular grating.

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    Writing Bragg Gratings in Multicore Fibers
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    Published on: April 20, 2016

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    Last Updated: Jun 22, 2026

    Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
    07:28

    Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

    Published on: August 30, 2012

    Writing Bragg Gratings in Multicore Fibers
    08:48

    Writing Bragg Gratings in Multicore Fibers

    Published on: April 20, 2016

  • Experimental characterization of reflectivity, bandwidth, and loss.

    • Main Results:

    • A large shift in Bragg wavelength (tens of nanometers) was predicted with air-core thickness changes.
    • A fabricated HWBDR exhibited strong Bragg reflection at 1558 nm for TM mode.
    • Achieved 3 nm wavelength tuning by varying air-core thickness from 10 µm to 7.9 µm.

    Conclusions:

    • Variable air-core thickness is an effective method for tuning HWBDRs.
    • The fabricated device shows promising performance for tunable optical filtering.
    • This technology enables dynamic wavelength control in photonic integrated circuits.