Using numerical simulation method based on finite-difference time-domain (FDTD), we study the characteristics of the multiple-core photonic crystal fibers (PCFs) in which square-nested compound lattices (SNCLs) with several defect regions are introduced. We find that each line defect in the PCFs can serve as a channel in wavelength division multiplexing (WDM) communication systems. The crosstalk can be suppressed because there is a band gap among each channel in the PCFs. And PCF amplifiers are expected to be used in the super-dense WDM systems.
© 2005 Chinese Optics Letters
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(120.4570) Instrumentation, measurement, and metrology : Optical design of instruments
(160.2290) Materials : Fiber materials
(230.0230) Optical devices : Optical devices
Zhenghua Li, Yuntuan Fang, Tinggen Shen, Min Zhu, and Bingchuan Xie, "Study of optical gain from square-nested PCFs with impurities," Chin. Opt. Lett. 3, S251-S252 (2005)