Dispersion engineered Ge₁₁.₅As₂₄ Se₆₄.₅ nanowire for supercontinuum generation: a parametric study.

A promising design of Ge₁₁.₅As₂₄ Se₆₄.₅ nanowires for supercontinuum generation is proposed through numerical simulations. It can be used for generating a supercontinuum with 1300-nm bandwidth. The dispersion parameters upto eighth-order are obtained by calculating the effective mode index with the finite-element method. We have investigated dispersion curves for a number of nanowire geometries. Through dispersion engineering and by varying dimensions of the nanowires we have identified a promising structure that shows possibility of realizing a wideband supercontinuum. We have found significant variations in its bandwidth with the inclusion of higher-order dispersion coefficients and indicated the possibility of obtaining spurious results if the adequate number of dispersion coefficients is not considered. To confirm the accuracy of dispersion coefficients obtained through numerical computations, we have shown that a data-fitting procedure based on the Taylor series expansion provides good agreement with the actual group velocity dispersion curve obtained by using a full-vectorial finite-element mode-solver.

[1]  B. Eggleton,et al.  Highly nonlinear chalcogenide glass micro/nanofiber devices: Design, theory, and octave-spanning spectral generation , 2012 .

[2]  P. Russell,et al.  Soliton Self-Frequency Shift Cancellation in Photonic Crystal Fibers , 2003, Science.

[3]  Steve Madden,et al.  Dispersion engineered Ge11.5As24Se64.5 nanowires with a nonlinear parameter of 136 W⁻¹m⁻¹ at 1550 nm. , 2010, Optics express.

[4]  D. Skryabin,et al.  Theory of the soliton self-frequency shift compensation by the resonant radiationin photonic crystal fibers. , 2004, Physical review. E, Statistical, nonlinear, and soft matter physics.

[5]  Yi Yu,et al.  Low-loss chalcogenide waveguides for chemical sensing in the mid-infrared. , 2013, Optics express.

[6]  Stuart D. Jackson,et al.  Octave spanning supercontinuum in an As2S3 taper using ultra-low pump pulse energy , 2011, CLEO: 2011 - Laser Science to Photonic Applications.

[7]  Yurii A. Vlasov,et al.  Supercontinuum generation in silicon photonic wires , 2007 .

[8]  M D Pelusi,et al.  Long, low loss etched As(2)S(3) chalcogenide waveguides for all-optical signal regeneration. , 2007, Optics express.

[9]  Fengnian Xia,et al.  Supercontinuum generation in silicon photonic wires , 2007, 2008 IEEE/LEOS Winter Topical Meeting Series.

[10]  Jasbinder S. Sanghera,et al.  Maximizing the bandwidth of supercontinuum generation in As2Se3 chalcogenide fibers. , 2010, Optics express.

[11]  B. M. A. Rahman,et al.  Vector-H finite element solution of GaAs/GaAlAs rib waveguides , 1985 .

[12]  M. Liao,et al.  Chalcogenide Core Tellurite Cladding Composite Microstructured Fiber for Nonlinear Applications , 2012, Journal of Lightwave Technology.

[13]  Steve Madden,et al.  Supercontinuum generation in dispersion engineered highly nonlinear (gamma = 10 /W/m) As2S3) chalcogenide planar waveguide. , 2008, Optics express.

[14]  B. Eggleton,et al.  Dispersion Engineering of Highly Nonlinear As2S3 Waveguides for Parametric Gain and Wavelength Conversion , 2007, COIN-ACOFT 2007 - Joint International Conference on the Optical Internet and the 32nd Australian Conference on Optical Fibre Technology.

[15]  Benjamin J Eggleton,et al.  1.9 octave supercontinuum generation in a As₂S₃ step-index fiber driven by mid-IR OPCPA. , 2014, Optics letters.

[16]  M. Schmidt,et al.  Supercontinuum generation in chalcogenide-silica step-index fibers. , 2011, Optics express.

[17]  Y. Vlasov,et al.  Ultrafast-pulse self-phase modulation and third-order dispersion in Si photonic wire-waveguides. , 2006, Optics express.

[18]  Feng Luan,et al.  Dispersion engineered As(2)S(3) planar waveguides for broadband four-wave mixing based wavelength conversion of 40 Gb/s signals. , 2009, Optics express.

[19]  Benjamin J Eggleton,et al.  Low-threshold supercontinuum generation in highly nonlinear chalcogenide nanowires. , 2008, Optics letters.

[20]  I Hartl,et al.  Mid-infrared supercontinuum generation in As2S3-silica "nano-spike" step-index waveguide. , 2013, Optics express.

[21]  Steve Madden,et al.  Progress in optical waveguides fabricated from chalcogenide glasses. , 2010, Optics express.

[22]  Benjamin J. Eggleton,et al.  Dispersion engineering of highly nonlinear As(2)S(3) waveguides for parametric gain and wavelength conversion. , 2007 .

[23]  Jasbinder S. Sanghera,et al.  DEVELOPMENT AND APPLICATIONS OF CHALCOGENIDE GLASS OPTICAL FIBERS AT NRL , 2001 .

[24]  B. Rahman,et al.  Finite-element solution of integrated optical waveguides , 1984 .

[25]  J. Dudley,et al.  Supercontinuum generation in photonic crystal fiber , 2006 .

[26]  Tonglei Cheng,et al.  Mid-infrared supercontinuum generation in a suspended-core As2S3 chalcogenide microstructured optical fiber. , 2013, Optics express.

[27]  Qiang Lin,et al.  Soliton fission and supercontinuum generation in silicon waveguides. , 2007, Optics letters.