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Compact multichannel high-resolution micro-electro-mechanical systems-based interrogator for Fiber Bragg grating

D Ganziy, B Rose, O Bang

    Applied Optics
    |April 22, 2017
    PubMed
    Summary
    This summary is machine-generated.

    A new micro-electro-mechanical systems (MEMS) interrogator uses a digital micromirror device (DMD) instead of a linear detector. This cost-effective approach enhances performance for multichannel systems and Fiber Bragg grating (FBG) interrogation.

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    Area of Science:

    • Optoelectronics
    • Spectroscopy
    • Micro-electro-mechanical systems (MEMS)

    Background:

    • Traditional interrogators often use linear detectors, which can be expensive and limit multichannel capabilities.
    • InGaAs detectors in the 1550 nm range present cost and performance limitations for high-resolution spectroscopy.

    Purpose of the Study:

    • To introduce a novel, cost-effective, high-resolution multichannel interrogator using a digital micromirror device (DMD).
    • To demonstrate the feasibility of using DMDs in spectroscopy and Fiber Bragg grating (FBG) interrogation.

    Main Methods:

    • Replacement of linear detectors with a digital micromirror device (DMD) in a micro-electro-mechanical systems (MEMS)-based interrogator.
    • Implementation of multichannel systems leveraging the 2D array nature of the DMD.
    • Exploration of programmable Hadamard spectroscopy enabled by the DMD's digital characteristics.

    Main Results:

    • The DMD offers a cheaper and better pixel sampling alternative to traditional InGaAs detectors.
    • Multichannel systems can be realized without additional optical components, significantly reducing cost.
    • The digital nature of the DMD enables advanced Hadamard spectroscopy, improving wavelength fit resolution.

    Conclusions:

    • Digital micromirror devices (DMDs) are suitable for high-resolution spectroscopy applications.
    • The proposed MEMS-based interrogator with a DMD is a cost-effective solution for multichannel systems and Fiber Bragg grating (FBG) interrogation.