Polarizing photonic crystal fiber with low index inclusion in the core

We demonstrate that adding a boron-doped inclusion in the core of a polarizing photonic crystal fiber significantly increases its polarization bandwidth. We present the characteristics of two fabricated fibers, including spectral dependence of loss in both polarization modes and polarization-dependent loss in straight as well as bent fibers. Our experiments prove that bending significantly increases the polarization band of the boron-doped fibers on the short wavelength edge. For a properly adjusted bending radius a single polarization guidance can be obtained in a wide spectral range. Moreover, we present the results of loss simulations carried out for the actual geometry of the fabricated fibers, which are in agreement with the measurement results.

[1]  M. Andrés,et al.  High Extinction-Ratio Polarizing Endlessly Single-Mode Photonic Crystal Fiber , 2007, IEEE Photonics Technology Letters.

[2]  R. Dyott,et al.  Elliptical Fiber Waveguides , 1995 .

[3]  Tadeusz Martynkien,et al.  Polarizing photonic crystal fibers with wide operation range , 2004 .

[4]  Moty Heiblum,et al.  Analysis of curved optical waveguides by conformal transformation , 1975 .

[5]  Albert Ferrando,et al.  Single-polarization single-mode intraband guidance in supersquare photonic crystals fibers , 2001 .

[6]  P Andrés,et al.  Full-vector analysis of a realistic photonic crystal fiber. , 1999, Optics letters.

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

[8]  J. Folkenberg,et al.  Broadband single-polarization photonic crystal fiber. , 2005, Optics letters.

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

[10]  I P Kaminow,et al.  Binary silica optical fibers: refractive index and profile dispersion measurements. , 1976, Applied optics.

[11]  T A Birks,et al.  Fundamental-mode cutoff in a photonic crystal fiber with a depressed-index core. , 2001, Optics letters.

[12]  Waveguiding properties of a photonic crystal fiber with a solid core surrounded by four large air holes. , 2009, Optics express.

[13]  M.S. Demokan,et al.  Design of single-polarization single-mode photonic crystal fiber at 1.30 and 1.55 /spl mu/m , 2006, Journal of Lightwave Technology.

[14]  Michael J. Steel,et al.  Polarization and dispersive properties of elliptical-hole photonic crystal fibers , 2001 .

[15]  J. R. Onstott,et al.  A broad-band single polarization optical fiber , 1991 .

[16]  J. Limpert,et al.  Stress-induced single-polarization single-transverse mode photonic crystal fiber with low nonlinearity. , 2005, Optics express.

[17]  Fernando L. Teixeira,et al.  General closed-form PML constitutive tensors to match arbitrary bianisotropic and dispersive linear media , 1998 .

[18]  Jacek Olszewski,et al.  Effect of coupling between fundamental and cladding modes on bending losses in photonic crystal fibers. , 2005, Optics express.