Selective Excitation of Circular Helical Modes in Graded Index Fibers

Authors: S. Al-Sowayan

Abstract:

The impact of selective excitation of circular helical modes of graded-index fibers on its capacity is analyzed using a model for propagation delay variation with launch offset and angle that resulted from misalignment of source and fiber axis. Results show promising technique to improve graded-index fiber capacities.

Keywords: Fiber measurements, Fiber optic communications.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1335930

References:

[1] L. Raddatz, I. H. White, D.G. Cunningham and M.C. Nowell, "An experimental and theoretical study of the offset launch technique for the enhancement of the bandwidth of multimode fiber links,” J. of Lightwave Technol., 16, pp 324-331, (1998).
[2] L. Raddatz and I. H. White, "Overcoming the modal bandwidth limitation of multimode fiber by using passband modulation,” IEEE Photonics Technol. Lett., 11, 2, 266-268, (1999).
[3] M. Webster, L. Raddatz, I. H. White, and D. G. Cunningham, "A statistical analysis of conditioned launch for gigabit ethernet links using multimode fiber,” IEEE J. of Lightwave Technol., 17, 9, 1532-1541, (1999).
[4] S. Murshid, B. Grossman, and P. Narakorn, "Spatial domain multiplexing: A new dimension in fiber multiplexing,” Optics and Laser Technology, 40, 8, pp 995-1104, November (2008).
[5] L. J. Sargent, M. Webster, I. H. White, P. J. Heard, R. V. Penty, M. R. T. Tan, and D. G. Cunningham, "Simple technique for bandwidth enhancement of multimode fiber links using controlled spatial emission from vertical cavity surface emitting lasers,” Electron. Lett., 34, 21, 2038-2040, (1998).
[6] S. Al-Sowayan and K. L. Lear, "Data pattern dependence of VCSEL far-field distributions,” IEEE Photonics Technol. Lett., 16, 10, 2215-2217, (2004).
[7] S. Al-Sowayan and K. L. Lear, "Nonlinear Equalization of MMF System Considering Source non-idealities,” OSA Annual Meeting FiO’05, Tucson, USA (2005)
[8] C.P Tsekrekos, A.M.J Koonen, H.P.A van den Boom, "Selective Excitation of Graded Multimode Fibers Resulting in Annular Near Field Patterns,” Proceedings Symposium IEEE/LEOS Benelux Chapter, 2004, Ghent