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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: G. I. Stegeman
  • Vol. 23, Iss. 11 — Nov. 1, 2006
  • pp: 2448–2453

Enhanced nonlinearity in a simultaneously tapered and Yb 3 + -doped photonic crystal fiber

Jianguo Liu, Lifang Xue, Yange Liu, Yanli Jin, Guiyun Kai, Yan Li, Long Jin, Zhi Wang, Shuzhong Yuan, and Xiaoyi Dong  »View Author Affiliations

JOSA B, Vol. 23, Issue 11, pp. 2448-2453 (2006)

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The nonlinearity of photonic crystal fibers (PCFs) can be enhanced by simutaneously tapering the fiber and doping rare-earth ions (such as Yb 3 + ) or chalcogenide in the core. The properties of the Yb 3 + -doped and tapered PCF is numerically investigated by the beam propagation method. The results show that the difference of the optical field distribution between the doped and the pure silica PCF is not huge, and the mode field area of the doped PCF is only a little smaller than that of pure silica PCF. However, the nonlinearity of the doped PCF is enhanced dramatically by doping Yb ions in the core. Furthermore, the optimal boundary profile of the transverse structural parameters for maximal nonlinearity coefficient is acquired, and the boundary normalized pitch decreases exponentially with the boundary normalized hole size increasing. Finally, the longitudinal criterion for tapering is proposed, namely, that the normalized distance of the taper slope should be longer than 30 μ m . All these results will provide references for enhancing the nonlinearity of PCFs.

© 2006 Optical Society of America

OCIS Codes
(000.4430) General : Numerical approximation and analysis
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2400) Fiber optics and optical communications : Fiber properties

ToC Category:
Photonic Crystals

Original Manuscript: May 4, 2006
Revised Manuscript: July 14, 2006
Manuscript Accepted: July 14, 2006

Jianguo Liu, Lifang Xue, Yange Liu, Yanli Jin, Guiyun Kai, Yan Li, Long Jin, Zhi Wang, Shuzhong Yuan, and Xiaoyi Dong, "Enhanced nonlinearity in a simultaneously tapered and Yb3+-doped photonic crystal fiber," J. Opt. Soc. Am. B 23, 2448-2453 (2006)

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