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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 15, Iss. 2 — Feb. 1, 1998
  • pp: 773–780

Enhancement of Čerenkovian second-harmonic-generation power with ultraviolet irradiation-formed nonlinear optical χ(2) corrugation and channel waveguide

Heihachi Sato, Hiroaki Matsuno, and Iwao Seo  »View Author Affiliations

JOSA B, Vol. 15, Issue 2, pp. 773-780 (1998)

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By irradiation of a UV source through a metallic mask with a chirped periodic or periodic structure and a metallic wire onto vinylidene cyanide/vinyl acetate copolymer, the Čerenkov-radiative second-harmonic generation has been efficiently enhanced, with the channel waveguide having a chirped periodic nonlinear optical susceptibility χ(2) corrugation. By use of an ArF 193-nm laser close to an inherent absorption line of the copolymer as the UV source, not only a nonlinear optical χ(2) corrugation with the average period Λs0=20 μm and a chirping index ϕm9 but also a channel guide 60 μm wide were induced. The enhancement factor of the Čerenkovian second-harmonic-generation power achieved was 7.4 times that of a uniform nonlinear optical χ(2) scheme. This simple UV irradiation method leads to almost the same effect as is obtained by a contact electrode method, showing its feasibility for the Čerenkovian second-harmonic-generation scheme.

© 1998 Optical Society of America

OCIS Codes
(230.7380) Optical devices : Waveguides, channeled
(320.1590) Ultrafast optics : Chirping

Heihachi Sato, Hiroaki Matsuno, and Iwao Seo, "Enhancement of Čerenkovian second-harmonic-generation power with ultraviolet irradiation-formed nonlinear optical χ(2) corrugation and channel waveguide," J. Opt. Soc. Am. B 15, 773-780 (1998)

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  1. For example, see M. J. Li, M. De Micheli, Q. He, and D. B. Ostrowsky, “Čerenkov configuration second harmonic generation in proton-exchanged lithium niobate guides,” IEEE J. Quantum Electron. 26, 1384–1393 (1990). [CrossRef]
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  8. It is not necessary that the guide be asymmetric. The asymmetry is due only to a technical problem in inducing a uniform poling with the remaining lower metallic electrode.
  9. H. Taub and D. L. Schilling, Principles of Communication Systems (McGraw-Hill, New York, 1971), p. 123.
  10. H. Sato and Y. Azumai, “Comparison of enhanced Čerenkov-radiative SHG power with various nonlinear optical susceptibility structures in waveguide,” in Nonlinear Optical Properties of Organic Materials VII, G. R. Möhlmann, ed., Proc. SPIE 2285, 272–281 (1994). [CrossRef]

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