Optical Review

, Volume 18, Issue 1, pp 166–170

Optical properties of a waveguide written inside a LiTaO3 crystal by irradiation with focused femtosecond laser pulses

  • Makoto Kumatoriya
  • Miki Nakabayashi
  • Masaaki Sakakura
  • Yasuhiko Shimotsuma
  • Kiyotaka Miura
  • Takashi Fujii
  • Kazuyuki Hirao
Regular Papers

DOI: 10.1007/s10043-011-0017-z

Cite this article as:
Kumatoriya, M., Nakabayashi, M., Sakakura, M. et al. OPT REV (2011) 18: 166. doi:10.1007/s10043-011-0017-z

Abstract

Optical waveguides were fabricated by modifying the optical properties inside a LiTaO3 crystal by irradiation with femtosecond laser pulses, and the performance and optical properties of the waveguide were investigated. On the basis of near-field pattern of the light guided through the waveguides, the optimum writing conditions such as the pulse energy and the pulse duration were determined. The waveguide written inside a LiTaO3 crystal had a strong polarization dependence of guided light. Observation by a polarized microscope suggested that the stress distribution around the photoexcited region should be responsible for the polarization dependence of guided light. In addition, the second harmonic generation from a laser beam passing through the waveguide was observed, which suggests that the ferroelectric properties of LiTaO3 were preserved after the photoexcitation.

Keywords

femtosecond pulse laserLiTaO3refractive indexnear-field patternoptical waveguidephotoexcitation

Copyright information

© The Optical Society of Japan 2011

Authors and Affiliations

  • Makoto Kumatoriya
    • 1
  • Miki Nakabayashi
    • 2
  • Masaaki Sakakura
    • 3
  • Yasuhiko Shimotsuma
    • 3
  • Kiyotaka Miura
    • 2
  • Takashi Fujii
    • 1
  • Kazuyuki Hirao
    • 2
  1. 1.Technology and Business Development UnitMurata Manufacturing Co., Ltd.Nagaokakyo, KyotoJapan
  2. 2.Department of Material Chemistry, Graduate School of EngineeringKyoto UniversityKyotoJapan
  3. 3.Innovate Collaboration CenterKyoto UniversityKyotoJapan