Broadband Single-Polarization Single-Mode Photonic Crystal Fiber Coupler

In this letter, a novel design for a photonic crystal fiber coupler with single-polarization single-mode (SPSM) functionality is proposed and investigated using a vector plane-wave expansion method and a vector finite-element method. We study the changes in the coupling lengths between the two orthogonal polarizations and the width of the SPSM coupling region with respect to the air-hole parameters. We demonstrate that the SPSM coupling range can be more than 200 nm wide for a variety of air-hole parameters and show that the position and width of the SPSM coupling region can be tailored via the diameters of the large inner air holes and the small cladding air holes

[1]  Brian Joseph Mangan,et al.  Experimental study of dual-core photonic crystal fibre , 2000 .

[2]  P. Russell,et al.  Endlessly single-mode photonic crystal fiber. , 1997, Optics letters.

[3]  Alexander Argyros,et al.  Coupling in a twin-core microstructured polymer optical fiber , 2004 .

[4]  Kunimasa Saitoh,et al.  Coupling characteristics of dual-core photonic crystal fiber couplers. , 2003, Optics express.

[5]  A. Stentz,et al.  Optical properties of high-delta air silica microstructure optical fibers. , 2000, Optics letters.

[6]  J. Broeng,et al.  Highly birefringent index-guiding photonic crystal fibers , 2001, IEEE Photonics Technology Letters.

[7]  S. Kawanishi,et al.  Absolutely single polarization photonic crystal fiber , 2004, IEEE Photonics Technology Letters.

[8]  Guiyun Kai,et al.  Coupling and decoupling of dual-core photonic bandgap fibers. , 2005, Optics letters.

[9]  J. Knight,et al.  Dispersion compensation using single-material fibers , 1999, IEEE Photonics Technology Letters.

[10]  Ole Bang,et al.  Photonic crystal fiber design for broadband directional coupling. , 2004, Optics letters.

[11]  M. Koshiba,et al.  The impact of elliptical deformations for optimizing the performance of dual-core fluorine-doped photonic crystal fiber couplers. , 2006, Optics express.

[12]  K. Saitoh,et al.  Single-polarization single-mode photonic crystal fibers , 2003, IEEE Photonics Technology Letters.

[13]  Gaetano Bellanca,et al.  Full vectorial BPM modeling of Index-Guiding Photonic Crystal Fibers and Couplers. , 2002, Optics express.

[14]  Stefano Selleri,et al.  Polarization splitter based on a square-lattice photonic-crystal fiber. , 2006, Optics letters.

[15]  Changxi Yang,et al.  Polarization splitter based on photonic crystal fibers. , 2003, Optics express.

[16]  Byeong Ha Lee,et al.  Photonic crystal fiber coupler. , 2002, Optics letters.

[17]  Kunimasa Saitoh,et al.  Polarization splitter in three-core photonic crystal fibers. , 2004, Optics express.

[18]  J Laegsgaard.  Directional coupling in twin-core photonic bandgap fibers. , 2005, Optics letters.

[19]  Knight,et al.  Single-Mode Photonic Band Gap Guidance of Light in Air. , 1999, Science.