Narrow band-pass transmission filter consisting of two fiber bragg gratings with different periods

Yusuke Yabe, Yuto Yamada, Shinichi Komatsu

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    We developed a narrow band-pass transmission filter by connecting in series two fiber Bragg gratings (FBGs) with slightly different periods. The filter was fabricated by writing two FBGs directly onto the core of a single optical fiber. The center wavelengths of the element FBGs are 1549.71 nm and 1550.05 nm, their bandwidths are 0.36 nm and 0.42 nm, and their reflectances are 99.8% and 99.9%, respectively. The measured bandwidth (full width at half maximum, FWHM) of the fabricated band-pass filter is 0.052nm, and the maximum transmittance is -12.5 dB. In order to reduce the transmission loss, we adjusted the period difference between the two element FBGs by temperature control, and achieved a maximum transmittance of -0.3 dB although the bandwidth slightly increased up to 0.092 nm. To obtain the narrower bandwidth of the transmission peak, we fabricated a series-type FBG filter using FBGs with higher reflectance, whose measured band-pass bandwidth was as narrow as 0.033 nm.

    Original languageEnglish
    Pages (from-to)5776-5779
    Number of pages4
    JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
    Volume43
    Issue number8 B
    DOIs
    Publication statusPublished - 2004 Aug

    Fingerprint

    Fiber Bragg gratings
    Bragg gratings
    narrowband
    filters
    fibers
    bandwidth
    Bandwidth
    transmittance
    reflectance
    temperature control
    transmission loss
    Bandpass filters
    Full width at half maximum
    bandpass filters
    Temperature control
    Optical fibers
    optical fibers
    Wavelength
    wavelengths

    Keywords

    • Band-pass filters
    • Fiber bragg grating
    • Narrow bandwidth
    • Temperature characteristics
    • Wavelength shift

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

    Cite this

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    title = "Narrow band-pass transmission filter consisting of two fiber bragg gratings with different periods",
    abstract = "We developed a narrow band-pass transmission filter by connecting in series two fiber Bragg gratings (FBGs) with slightly different periods. The filter was fabricated by writing two FBGs directly onto the core of a single optical fiber. The center wavelengths of the element FBGs are 1549.71 nm and 1550.05 nm, their bandwidths are 0.36 nm and 0.42 nm, and their reflectances are 99.8{\%} and 99.9{\%}, respectively. The measured bandwidth (full width at half maximum, FWHM) of the fabricated band-pass filter is 0.052nm, and the maximum transmittance is -12.5 dB. In order to reduce the transmission loss, we adjusted the period difference between the two element FBGs by temperature control, and achieved a maximum transmittance of -0.3 dB although the bandwidth slightly increased up to 0.092 nm. To obtain the narrower bandwidth of the transmission peak, we fabricated a series-type FBG filter using FBGs with higher reflectance, whose measured band-pass bandwidth was as narrow as 0.033 nm.",
    keywords = "Band-pass filters, Fiber bragg grating, Narrow bandwidth, Temperature characteristics, Wavelength shift",
    author = "Yusuke Yabe and Yuto Yamada and Shinichi Komatsu",
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    TY - JOUR

    T1 - Narrow band-pass transmission filter consisting of two fiber bragg gratings with different periods

    AU - Yabe, Yusuke

    AU - Yamada, Yuto

    AU - Komatsu, Shinichi

    PY - 2004/8

    Y1 - 2004/8

    N2 - We developed a narrow band-pass transmission filter by connecting in series two fiber Bragg gratings (FBGs) with slightly different periods. The filter was fabricated by writing two FBGs directly onto the core of a single optical fiber. The center wavelengths of the element FBGs are 1549.71 nm and 1550.05 nm, their bandwidths are 0.36 nm and 0.42 nm, and their reflectances are 99.8% and 99.9%, respectively. The measured bandwidth (full width at half maximum, FWHM) of the fabricated band-pass filter is 0.052nm, and the maximum transmittance is -12.5 dB. In order to reduce the transmission loss, we adjusted the period difference between the two element FBGs by temperature control, and achieved a maximum transmittance of -0.3 dB although the bandwidth slightly increased up to 0.092 nm. To obtain the narrower bandwidth of the transmission peak, we fabricated a series-type FBG filter using FBGs with higher reflectance, whose measured band-pass bandwidth was as narrow as 0.033 nm.

    AB - We developed a narrow band-pass transmission filter by connecting in series two fiber Bragg gratings (FBGs) with slightly different periods. The filter was fabricated by writing two FBGs directly onto the core of a single optical fiber. The center wavelengths of the element FBGs are 1549.71 nm and 1550.05 nm, their bandwidths are 0.36 nm and 0.42 nm, and their reflectances are 99.8% and 99.9%, respectively. The measured bandwidth (full width at half maximum, FWHM) of the fabricated band-pass filter is 0.052nm, and the maximum transmittance is -12.5 dB. In order to reduce the transmission loss, we adjusted the period difference between the two element FBGs by temperature control, and achieved a maximum transmittance of -0.3 dB although the bandwidth slightly increased up to 0.092 nm. To obtain the narrower bandwidth of the transmission peak, we fabricated a series-type FBG filter using FBGs with higher reflectance, whose measured band-pass bandwidth was as narrow as 0.033 nm.

    KW - Band-pass filters

    KW - Fiber bragg grating

    KW - Narrow bandwidth

    KW - Temperature characteristics

    KW - Wavelength shift

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