CUED Publications database

Mode coupling effects in ring-core fibers for space-division multiplexing systems

Jin, X and Gomez, A and Shi, K and Thomsen, BC and Feng, F and Gordon, GSD and Wilkinson, TD and Jung, Y and Kang, Q and Barua, P and Sahu, J and Alam, SU and Richardson, DJ and Obrien, DC and Payne, FP (2016) Mode coupling effects in ring-core fibers for space-division multiplexing systems. Journal of Lightwave Technology, 34. pp. 3365-3372. ISSN 0733-8724

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© 1983-2012 IEEE. An optical fiber with weak mode coupling is desirable for future ultrahigh capacity space-division multiplexing (SDM) systems because mode coupling in an optical fiber results in extrinsic loss of the fiber and crosstalk between guided optical modes. To study the feasibility of a ring-core fiber (RCF) for SDM systems, in this paper, we investigate the mode coupling in the RCF supporting five or seven guided mode groups (MGs) at a wavelength of 1550 nm. For this purpose, the coupled mode/power theory with identified spatial power spectrum of random perturbations of fiber axis is used to estimate the bend loss/crosstalk of the RCF due to microbending. It is shown that based on the identified parameters for the spatial power spectrum in the 5/7-MG RCF, the estimated bend loss/crosstalk of the RCF agrees well with experimental results. In addition, the impact of the gradient parameter α and refractive index contrast Δ of the fiber refractive index profile on bend loss and crosstalk of the RCF is explored. Simulation results indicate that the Δ instead of the α significantly affects bend loss and crosstalk of the RCF. The magnitude improvement in bend loss by increasing the Δ is dependent on the spatial power spectrum.

Item Type: Article
Divisions: Div B > Photonics
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:01
Last Modified: 24 May 2018 01:59