Design trade-offs and optimization of radially single-mode and azimuthally multimode ring-core fibers for mode-division multiplexing systems
Optics Express, ISSN: 1094-4087, Vol: 27, Issue: 8, Page: 11844-11861
2019
- 3Citations
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Article Description
This paper investigates the design trade-offs of radially single-mode and azimuthally multimode (RSMAM) ring-core fibers (RCFs), thereby revealing a more efficient use of the weakly coupled linearly polarized (LP) modes in mode-division multiplexing (MDM) systems. The influences of the increasing number of LP modes on the main propagation properties (i.e., effective index difference, effective area A , and macro-bending sensitivity at a wavelength of 1550 nm) and the key limiting factors for such an increase are numerically described. Based on 1) the design criteria of weakly coupled few-mode fibers described in [P. Sillard, J. Lightw. Technol. 32, 2824 (2014)] and 2) an assumption that the refractive index contrast is ≤1% (for facilitating the fiber manufacturing), we point out that the step-index 4-LP-mode RSMAM RCF appears feasible, while RSMAM RCFs with a higher number of LP modes are still primarily limited by the oversized A and undesired macro-bending sensitivities. Finally, in order to provide a better compatibility with weakly coupled MDM systems, we present improved designs for the 3- and 4-LP-mode RSMAM RCFs given in [M. Kasahara, J. Lightw. Technol. 32, 1337 (2014)] and [Y. Jung, J. Lightw. Technol. 35, 1363 (2017)] by taking into account the spatial information densities and macro-bending sensitivities.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85064459433&origin=inward; http://dx.doi.org/10.1364/oe.27.011844; http://www.ncbi.nlm.nih.gov/pubmed/31053024; https://opg.optica.org/abstract.cfm?URI=oe-27-8-11844; https://dx.doi.org/10.1364/oe.27.011844; https://opg.optica.org/oe/abstract.cfm?uri=oe-27-8-11844
Optica Publishing Group
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