Optical coupling device

Matteo Cherchi (Inventor), Giacomo Gorni (Inventor)

    Research output: PatentPatent application

    Abstract

    An optical mode converter has a coupling waveguide and a receiving waveguide. The coupling waveguide has at an input end a first effective refractive index and includes a tapered core of a substantially constant refractive index with a substantially square cross section at the input end, which has a size that tapers down moving away from the input end. The coupling waveguide also has a cladding at least partially surrounding the tapered core. The receiving waveguide has a second effective refractive index at an output end and includes a core of a substantially constant refractive index greater than the refractive index of the tapered core of the coupling waveguide and a cladding at least partially surrounding the core.; A side surface of the tapered core of the coupling waveguide is optically in contact, in a coupling portion, with the receiving waveguide so as to allow optical coupling between the coupling waveguide and the receiving waveguide. The refractive index of the tapered core of the coupling waveguide is selected so that the first effective refractive index and the second effective refractive index differ from each other in absolute value less than 30% of the difference between the core refractive index and the effective refractive index of the receiving waveguide.

    Original languageEnglish
    Patent numberUS2009245728 A1
    IPCG02B6/12
    Priority date29/12/03
    Publication statusPublished - 1 Oct 2009
    MoE publication typeNot Eligible

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    optical coupling
    waveguides
    refractivity
    tapering
    converters

    Cite this

    Cherchi, M., & Gorni, G. (2009). IPC No. G02B6/12. Optical coupling device. (Patent No. US2009245728 A1).
    Cherchi, Matteo (Inventor) ; Gorni, Giacomo (Inventor). / Optical coupling device. IPC No.: G02B6/12. Patent No.: US2009245728 A1.
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    title = "Optical coupling device",
    abstract = "An optical mode converter has a coupling waveguide and a receiving waveguide. The coupling waveguide has at an input end a first effective refractive index and includes a tapered core of a substantially constant refractive index with a substantially square cross section at the input end, which has a size that tapers down moving away from the input end. The coupling waveguide also has a cladding at least partially surrounding the tapered core. The receiving waveguide has a second effective refractive index at an output end and includes a core of a substantially constant refractive index greater than the refractive index of the tapered core of the coupling waveguide and a cladding at least partially surrounding the core.; A side surface of the tapered core of the coupling waveguide is optically in contact, in a coupling portion, with the receiving waveguide so as to allow optical coupling between the coupling waveguide and the receiving waveguide. The refractive index of the tapered core of the coupling waveguide is selected so that the first effective refractive index and the second effective refractive index differ from each other in absolute value less than 30{\%} of the difference between the core refractive index and the effective refractive index of the receiving waveguide.",
    author = "Matteo Cherchi and Giacomo Gorni",
    year = "2009",
    month = "10",
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    language = "English",
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    Cherchi, M & Gorni, G 2009, Optical coupling device, Patent No. US2009245728 A1, IPC No. G02B6/12.

    Optical coupling device. / Cherchi, Matteo (Inventor); Gorni, Giacomo (Inventor).

    IPC No.: G02B6/12. Patent No.: US2009245728 A1.

    Research output: PatentPatent application

    TY - PAT

    T1 - Optical coupling device

    AU - Cherchi, Matteo

    AU - Gorni, Giacomo

    PY - 2009/10/1

    Y1 - 2009/10/1

    N2 - An optical mode converter has a coupling waveguide and a receiving waveguide. The coupling waveguide has at an input end a first effective refractive index and includes a tapered core of a substantially constant refractive index with a substantially square cross section at the input end, which has a size that tapers down moving away from the input end. The coupling waveguide also has a cladding at least partially surrounding the tapered core. The receiving waveguide has a second effective refractive index at an output end and includes a core of a substantially constant refractive index greater than the refractive index of the tapered core of the coupling waveguide and a cladding at least partially surrounding the core.; A side surface of the tapered core of the coupling waveguide is optically in contact, in a coupling portion, with the receiving waveguide so as to allow optical coupling between the coupling waveguide and the receiving waveguide. The refractive index of the tapered core of the coupling waveguide is selected so that the first effective refractive index and the second effective refractive index differ from each other in absolute value less than 30% of the difference between the core refractive index and the effective refractive index of the receiving waveguide.

    AB - An optical mode converter has a coupling waveguide and a receiving waveguide. The coupling waveguide has at an input end a first effective refractive index and includes a tapered core of a substantially constant refractive index with a substantially square cross section at the input end, which has a size that tapers down moving away from the input end. The coupling waveguide also has a cladding at least partially surrounding the tapered core. The receiving waveguide has a second effective refractive index at an output end and includes a core of a substantially constant refractive index greater than the refractive index of the tapered core of the coupling waveguide and a cladding at least partially surrounding the core.; A side surface of the tapered core of the coupling waveguide is optically in contact, in a coupling portion, with the receiving waveguide so as to allow optical coupling between the coupling waveguide and the receiving waveguide. The refractive index of the tapered core of the coupling waveguide is selected so that the first effective refractive index and the second effective refractive index differ from each other in absolute value less than 30% of the difference between the core refractive index and the effective refractive index of the receiving waveguide.

    M3 - Patent

    M1 - US2009245728 A1

    ER -

    Cherchi M, Gorni G, inventors. Optical coupling device. G02B6/12. 2009 Oct 1.