Abstract

A fast, accurate and simple field coupling model is presented which is capable of describing mode coupling effects due to bends and splices in multimode fibers with parabolic index profile as well as the coupling losses induced by this process. This model is validated numerically by comparing the results to the well-known coupled amplitude theory model yielding the same relative bandwidth increase behavior as long as the coupling losses are the same. It is shown, that the number of discrete segments used in this model can be reduced considerably as long as the coupling losses are kept constant. The effect of mode coupling on the differential group delay, mode dependent loss, bandwidth gain and impulse response width reduction are analyzed. It is shown that the relative bandwidth gain induced in MMF links induced by the coupling process is independent of fiber parameters or number of guided modes; it can be fully characterized by coupling induced losses. The model is compared to well-known results given by power coupling models and a good agreement is observed for high steady state loss values.

© 2014 IEEE

Distributed loss and mode coupling and their effect on time-dependent propagation in multimode fibers

Michael J. Yadlowsky and Alan R. Mickelson
Appl. Opt. 32(33) 6664-6677 (1993)

Splice loss requirements in multi-mode fiber mode-division-multiplex transmission links

Stefan Warm and Klaus Petermann
Opt. Express 21(1) 519-532 (2013)

Splice loss and mode conversion in a multimode fiber

Norio Kashima
Appl. Opt. 19(15) 2597-2601 (1980)

Full-vectorial coupled mode theory for the evaluation of macro-bending loss in multimode fibers. application to the hollow-core photonic bandgap fibers.

Maksim Skorobogatiy, Kunimasa Saitoh, and Masanori Koshiba
Opt. Express 16(19) 14945-14953 (2008)

Evaluation of techniques to model bend loss in multimode fibers for endoscopic application

Jessica Eisenstein, Peter Y. Wong, and Caroline G. L. Cao
Appl. Opt. 49(12) 2220-2231 (2010)