Time and Modulation Frequency Dependence of Crosstalk in Homogeneous Multi-Core Fibers

This study presents an evaluation of the time and modulation frequency-varying power transfer of crosstalk in a homogeneous multi-core fiber (MCF). Experimental observations using a seven-core MCF over a period of 10 h show that, unlike localized crosstalk, distributed crosstalk power transfer has a pronounced modulation frequency response which changes substantially over time. This response is described using an adaptation of previous crosstalk models for MCFs showing that it results from the random time-varying interference between crosstalk contributions generated at a discrete number of phase matching points along the fiber. The model is used to produce simplified empirical models to characterize its average and variance. It is shown that both these quantities are nonzero and nearly constant for modulation frequencies above the inverse of the time skew between cores. These observations are validated by experimental data.

[1]  F. Devaux,et al.  Simple measurement of fiber dispersion and of chirp parameter of intensity modulated light emitter , 1993 .

[2]  H. Takara,et al.  Crosstalk-Managed High Capacity Long Haul Multicore Fiber Transmission With Propagation-Direction Interleaving , 2014, Journal of Lightwave Technology.

[3]  E. Ip,et al.  105Pb/s Transmission with 109b/s/Hz Spectral Efficiency using Hybrid Single- and Few-Mode Cores , 2012 .

[4]  T. Hayashi,et al.  Design and fabrication of ultra-low crosstalk and low-loss multi-core fiber. , 2011, Optics express.

[5]  N. Wada,et al.  Linear block-coding across >5 Tb/s PDM-64QAM spatial-super-channels in a 19-core fiber , 2015, 2015 European Conference on Optical Communication (ECOC).

[6]  Benyuan Zhu,et al.  Statistical Models of Multicore Fiber Crosstalk Including Time Delays , 2012, Journal of Lightwave Technology.

[7]  E Hugues-Salas,et al.  Software defined networking (SDN) over space division multiplexing (SDM) optical networks: features, benefits and experimental demonstration. , 2014, Optics express.

[8]  Naoya Wada,et al.  Experimental evaluation of the time and frequency crosstalk dependency in a 7-core multi-core fiber , 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

[9]  Naoya Wada,et al.  Long distance transmission in a multi-core fiber with self-homodyne detection , 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

[10]  Naoya Wada,et al.  Comparing inter-core skew fluctuations in multi-core and single-core fibers , 2015, 2015 Conference on Lasers and Electro-Optics (CLEO).

[11]  N. Wada,et al.  Experimental investigation of a 16-dimensional modulation format for long-haul multi-core fiber transmission , 2015, 2015 European Conference on Optical Communication (ECOC).

[12]  P. Beckmann.  Statistical distribution of the amplitude and phase of a multiply scattered field , 1962 .

[13]  Naoya Wada,et al.  Experimental Investigation of Crosstalk Penalties in Multicore Fiber Transmission Systems , 2015, IEEE Photonics Journal.

[14]  Kunimasa Saitoh,et al.  Multi-core fiber design and analysis , 2011, 2011 37th European Conference and Exhibition on Optical Communication.

[15]  Longitudinal fiber parameter measurements of multi-core fiber using OTDR. , 2014, Optics express.

[16]  Toshiki Sugawara,et al.  Multi-core fiber technology for optical-access and short-range links , 2014, 2014 12th International Conference on Optical Internet 2014 (COIN).

[17]  N Wada,et al.  Modulation formats for multi-core fiber transmission. , 2014, Optics express.

[18]  Naoya Wada,et al.  Single parity check-coded 16QAM over spatial superchannels in multicore fiber transmission. , 2015, Optics express.

[19]  T. Sasaki,et al.  Characterization of Crosstalk in Ultra-Low-Crosstalk Multi-Core Fiber , 2012, Journal of Lightwave Technology.

[20]  M. Fishteyn,et al.  Joint Digital Signal Processing Receivers for Spatial Superchannels , 2012, IEEE Photonics Technology Letters.

[21]  T. Hayashi,et al.  Crosstalk variation of multi-core fibre due to fibre bend , 2010, 36th European Conference and Exhibition on Optical Communication.

[22]  Tetsuya Hayashi,et al.  Behavior of Inter-Core Crosstalk as a Noise and Its Effect on Q-Factor in Multi-Core Fiber , 2014, IEICE Trans. Commun..

[23]  Naoya Wada,et al.  High-capacity self-homodyne PDM-WDM-SDM transmission in a 19-core fiber. , 2014, Optics express.

[24]  N. Wada,et al.  19-core fiber transmission of 19×100×172-Gb/s SDM-WDM-PDM-QPSK signals at 305Tb/s , 2012, OFC/NFOEC.

[25]  K. Petermann,et al.  Small signal analysis for dispersive optical fiber communication systems , 1992 .