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Related Concept Videos

Passive Filters01:27

Passive Filters

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Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
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Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
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Tunable electro-optic wavelength filter based on lossy-guided mode resonances.

Jesus M Corres, Joaquin Ascorbe, Francisco J Arregui

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    Summary

    This study introduces an optical fiber tunable filter utilizing lossy guided-mode resonances (LGMR). The device exhibits voltage-tunable wavelength shifts, demonstrating its potential for electro-optic applications.

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    Area of Science:

    • Photonics
    • Optical Engineering
    • Materials Science

    Background:

    • Optical filters are crucial components in various photonic systems.
    • Existing tunable filters often face limitations in performance or complexity.
    • Lossy guided-mode resonances (LGMR) offer a promising mechanism for filter design.

    Purpose of the Study:

    • To propose and fabricate a novel optical fiber tunable filter.
    • To investigate the performance of a filter based on LGMR.
    • To evaluate the filter's sensitivity to applied voltage.

    Main Methods:

    • Fabrication of a multilayer structure on a plastic cladding removed multimode fiber.
    • Integration of electrode layers for voltage application.
    • Characterization of the filter's optical response to applied voltage.

    Main Results:

    • Successful generation of LGMR within the multilayer structure.
    • Demonstration of voltage tunability for the filter.
    • Achieved a sensitivity of 0.4 nm/V for the LGMR wavelength shift.

    Conclusions:

    • The proposed optical fiber tunable filter based on LGMR is feasible.
    • The filter exhibits significant voltage sensitivity.
    • Potential applications include electro-optic wavelength filters and modulators.