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Applied Optics

Applied Optics


  • Vol. 43, Iss. 24 — Aug. 20, 2004
  • pp: 4697–4704

Design, fabrication, and evaluation of crystal-cored fibers for efficient second-harmonic generation based on Čerenkov-radiation-type phase matching

Kiyofumi Chikuma, Sota Okamoto, Naota Uenishi, Takafumi Uemiya, and Shinsuke Umegaki  »View Author Affiliations

Applied Optics, Vol. 43, Issue 24, pp. 4697-4704 (2004)

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A formulation for calculating the optical second-harmonic power based on the Čerenkov-radiation-type phase matching is derived for a crystal-cored fiber. The prerequisite condition for high efficiency is expressed by a simple relation by use of the refractive indices of a core crystal, a core radius, and a fundamental wavelength. An organic crystal-cored fiber is designed and practically fabricated by the guiding principle derived here. A blue second-harmonic wave of 1.4 mW is obtained from a 1-mm-long fiber by use of a 60-mW semiconductor laser, and the second-harmonic intensity agrees well with the prediction. Degradation of the organic core crystal caused by the generated blue wave is observed, and the lifetime of the device is evaluated.

© 2004 Optical Society of America

OCIS Codes
(160.4330) Materials : Nonlinear optical materials
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4360) Nonlinear optics : Nonlinear optics, devices
(190.4400) Nonlinear optics : Nonlinear optics, materials
(190.4710) Nonlinear optics : Optical nonlinearities in organic materials
(230.4320) Optical devices : Nonlinear optical devices

Original Manuscript: October 9, 2003
Revised Manuscript: April 1, 2004
Published: August 20, 2004

Kiyofumi Chikuma, Sota Okamoto, Naota Uenishi, Takafumi Uemiya, and Shinsuke Umegaki, "Design, fabrication, and evaluation of crystal-cored fibers for efficient second-harmonic generation based on Čerenkov-radiation-type phase matching," Appl. Opt. 43, 4697-4704 (2004)

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