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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 45, Iss. 9 — Mar. 20, 2006
  • pp: 2035–2038

Modal cutoff properties in germanium-doped photonic crystal fiber

Jianguo Liu, GuiYun Kai, Lifang Xue, Zhi Wang, Yange Liu, Yan Li, Chunshu Zhang, Tingting Sun, and Xiaoyi Dong  »View Author Affiliations

Applied Optics, Vol. 45, Issue 9, pp. 2035-2038 (2006)

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The germanium-doped photonic crystal fiber (PCF) has some characteristics that differentiate it from pure-silica PCF for a germanium element being doped in the core, such as the intensified nonlinearity, the enhanced photosensitivity, and so on. To pave the way for the application of the Ge-doped PCF successfully, it is necessary to study its properties. We investigated the modal cutoff properties of Ge-doped PCF quantitatively by using the beam propagation method. The numerical results show that the effective refractive indices and the normalized frequency V of Ge-doped PCF not only depend on the normalized pitch Λ / λ but also depend on the normalized hole size d / Λ , the modal cutoff boundary for the single mode–multimode of the Ge-doped PCF shift to the low d / Λ side in contrast to the pure-silica PCF.

© 2006 Optical Society of America

OCIS Codes
(000.4430) General : Numerical approximation and analysis
(060.2400) Fiber optics and optical communications : Fiber properties
(060.2430) Fiber optics and optical communications : Fibers, single-mode
(230.3990) Optical devices : Micro-optical devices

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: July 19, 2005
Revised Manuscript: September 16, 2005
Manuscript Accepted: September 30, 2005

Jianguo Liu, GuiYun Kai, Lifang Xue, Zhi Wang, Yange Liu, Yan Li, Chunshu Zhang, Tingting Sun, and Xiaoyi Dong, "Modal cutoff properties in germanium-doped photonic crystal fiber," Appl. Opt. 45, 2035-2038 (2006)

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