Design of low DMD few-mode optical fibers with extremely enlarged core diameter providing nonlinearity suppression for operating over “C”-band central region

We present method for design of refractive index profile for silica GeO2-doped graded-index few-mode optical fibers with reduced differential mode delay and suppressed mode nonlinearity due to extremely enlarged core diameter up to 42 μm. Proposed solution is based on earlier on developed modified Gaussian approximation generalized for analysis of silica weakly guiding optical fibers with single outer cladding and arbitrary axially-symmetric refractive index profile, that provides ability to derive analytical expressions for guided mode delays. Therefore the objective function is represented as a sum of squares of deviations between mode staff delays and reference value corresponding to refractive index profile of current iteration. Based on developed method we performed computation for various combination of the reference mode delay and first iteration profile parameter. Some results of desired graded-index profile for a few-mode optical fibers 42/125 providing differential mode delay minimization over central region of "C"-band are represented.

[1]  Yutaka Miyamoto,et al.  Dense Space-Division Multiplexed Transmission Systems Using Multi-Core and Multi-Mode Fiber , 2016, Journal of Lightwave Technology.

[2]  J. Crank.  Tables of Integrals , 1962 .

[3]  M. Abramowitz,et al.  Handbook of Mathematical Functions With Formulas, Graphs and Mathematical Tables (National Bureau of Standards Applied Mathematics Series No. 55) , 1965 .

[4]  L. Nelson,et al.  Space-division multiplexing in optical fibres , 2013, Nature Photonics.

[5]  D. Molin,et al.  50μm multimode fibers for mode division multiplexing , 2015, 2015 European Conference on Optical Communication (ECOC).

[6]  Evgenii M Dianov,et al.  On the Threshold of Peta-era , 2013 .

[7]  René-Jean Essiambre,et al.  Capacity Trends and Limits of Optical Communication Networks , 2012, Proceedings of the IEEE.

[8]  James S. Harris,et al.  Tables of integrals , 1998 .

[9]  Pierre Sillard.  Next-generation fibers for space-division-multiplexed transmissions , 2014, 2014 The European Conference on Optical Communication (ECOC).

[10]  Evgenii M Dianov,et al.  On the threshold of the peta era , 2013 .

[11]  D. Hall,et al.  An introduction to optical waveguides , 1982, Proceedings of the IEEE.

[12]  Anton V. Bourdine,et al.  Modeling and Simulation of Piecewise Regular Multimode Fiber Links Operating in a Few-Mode Regime , 2013 .

[13]  Daniel Fonseca,et al.  Design of Few-Mode Fibers With M-modes and Low Differential Mode Delay , 2014, Journal of Lightwave Technology.

[14]  Andrew D. Ellis.  The nonlinear Shannon limit and the need for new fibres , 2012, Photonics Europe.

[15]  Anton V. Bourdine,et al.  Investigation of defects of refractive index profile of silica graded-index multimode fibers , 2011, Optical Technologies for Telecommunications.

[16]  Anton V. Bourdine,et al.  CALCULATION OF TRANSMISSION PARAMETERS OF THE LAUNCHED HIGHER-ORDER MODES BASED ON THE COMBINATION OF A MODIFIED GAUSSIAN APPROXIMATION AND A FINITE ELEMENT METHOD , 2013 .

[17]  Stefano Bottacchi.  Multi-Gigabit Transmission over Multimode Optical Fibre: Theory and Design Methods for 10GbE Systems , 2006 .

[18]  Masaaki Hirano.  Future of Transmission Fiber , 2011, IEEE Photonics Journal.

[19]  Vladimir A. Burdin,et al.  Research of potentiality of nonlinear effects mitigation by considerable increasing of optical fiber core diameter , 2015, Other Conferences.

[20]  Masaki Wada,et al.  Few-Mode Fibers Supporting More Than Two LP Modes For Mode-Division-Multiplexed Transmission With MIMO DSP , 2014, Journal of Lightwave Technology.

[21]  Anton V. Bourdine,et al.  Design of Refractive Index Profile for Multimode Optical Fibers with Low Differential Mode Delay , 2013 .

[22]  Anton V. Bourdine,et al.  Fast and simple method for calculation of the mode field diameter of arbitrary order guided mode in weakly guiding optical fibers , 2015, Other Conferences.