Refractive-Index Changes of Titanium-Doped Near-Stoichiometric LiNbO 3 Crystals

Masaru Nakamura, Shunji Takekawa, Sunao Kurimura, Kenji Kitamura, Hirochika Nakajima

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    Titanium-doped (up to 9 mol%) near-stoichiometric LiNbO3 (SLN) crystals were grown from lithium-rich solutions by the top-seeded solution-growth method. The ordinary and the extraordinary refractive indices (no and ne) of the titanium-doped SLN (Ti:SLN) crystals were measured at room temperature by the prism-coupling technique in the wavelength range from 440 to 1550 nm. The relations between titanium concentrations and the ordinary and the extraordinary refractive-index changes (Δno and Δne) of the Ti:SLN crystals were investigated. Accordingly, it was found that both Δno and Δne linearly increase with increasing titanium concentration up to 9 mol% and that Δne is much larger than Δn o over the whole wavelength range. It was also found that both Δno and Δne increase with decreasing wavelength in all the Ti:SLN crystals with different titanium concentrations. Moreover, Δne of Ti:SLN doped with approximately 4 mol% of titanium (approximately 1 × 10-2) is almost the same as that of titanium-diffused SLN waveguides. In addition, a photoelastic effect on the refractive-index changes in the Ti:SLN crystal was estimated from using lattice-constant data determined by X-ray diffraction.

    Original languageEnglish
    JournalJapanese Journal of Applied Physics, Part 2: Letters
    Volume42
    Issue number10 A
    Publication statusPublished - 2003 Oct 1

    Fingerprint

    Refractive index
    titanium
    Titanium
    refractivity
    Crystals
    crystals
    doped crystals
    Wavelength
    wavelengths
    Photoelasticity
    Prisms
    prisms
    Lattice constants
    Waveguides
    Lithium
    lithium
    waveguides
    X ray diffraction
    room temperature
    diffraction

    Keywords

    • LiNbO (LN)
    • Refractive-index change
    • Stoichiometric LiNbO
    • Ti-dlffused waveguide

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

    Cite this

    Nakamura, M., Takekawa, S., Kurimura, S., Kitamura, K., & Nakajima, H. (2003). Refractive-Index Changes of Titanium-Doped Near-Stoichiometric LiNbO 3 Crystals. Japanese Journal of Applied Physics, Part 2: Letters, 42(10 A).

    Refractive-Index Changes of Titanium-Doped Near-Stoichiometric LiNbO 3 Crystals. / Nakamura, Masaru; Takekawa, Shunji; Kurimura, Sunao; Kitamura, Kenji; Nakajima, Hirochika.

    In: Japanese Journal of Applied Physics, Part 2: Letters, Vol. 42, No. 10 A, 01.10.2003.

    Research output: Contribution to journalArticle

    Nakamura, M, Takekawa, S, Kurimura, S, Kitamura, K & Nakajima, H 2003, 'Refractive-Index Changes of Titanium-Doped Near-Stoichiometric LiNbO 3 Crystals', Japanese Journal of Applied Physics, Part 2: Letters, vol. 42, no. 10 A.
    Nakamura, Masaru ; Takekawa, Shunji ; Kurimura, Sunao ; Kitamura, Kenji ; Nakajima, Hirochika. / Refractive-Index Changes of Titanium-Doped Near-Stoichiometric LiNbO 3 Crystals. In: Japanese Journal of Applied Physics, Part 2: Letters. 2003 ; Vol. 42, No. 10 A.
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    abstract = "Titanium-doped (up to 9 mol{\%}) near-stoichiometric LiNbO3 (SLN) crystals were grown from lithium-rich solutions by the top-seeded solution-growth method. The ordinary and the extraordinary refractive indices (no and ne) of the titanium-doped SLN (Ti:SLN) crystals were measured at room temperature by the prism-coupling technique in the wavelength range from 440 to 1550 nm. The relations between titanium concentrations and the ordinary and the extraordinary refractive-index changes (Δno and Δne) of the Ti:SLN crystals were investigated. Accordingly, it was found that both Δno and Δne linearly increase with increasing titanium concentration up to 9 mol{\%} and that Δne is much larger than Δn o over the whole wavelength range. It was also found that both Δno and Δne increase with decreasing wavelength in all the Ti:SLN crystals with different titanium concentrations. Moreover, Δne of Ti:SLN doped with approximately 4 mol{\%} of titanium (approximately 1 × 10-2) is almost the same as that of titanium-diffused SLN waveguides. In addition, a photoelastic effect on the refractive-index changes in the Ti:SLN crystal was estimated from using lattice-constant data determined by X-ray diffraction.",
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