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
© 2006 Optical Society of America
(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
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)