title: Simple analytical expression for crosstalk estimation in homogeneous trench-assisted multi-core fibers.
abstract: An analytical expression for the mode coupling coefficient in homogeneous trench-assisted multi-core fibers is derived, which has a simple relationship with the one in normal step-index structures. The amount of inter-core crosstalk reduction (in dB) with trench-assisted structures compared to the one with normal step-index structures can then be written by a simple expression. Comparison with numerical simulations confirms that the obtained analytical expression has very good accuracy for crosstalk estimation. The crosstalk properties in trench-assisted multi-core fibers, such as crosstalk dependence on core pitch and wavelength-dependent crosstalk, can be obtained by this simple analytical expression.
authors.forename: Feihong
authors.initials: F
authors.lastname: Ye
authors.forename: Jiajing
authors.initials: J
authors.lastname: Tu
authors.forename: Kunimasa
authors.initials: K
authors.lastname: Saitoh
authors.forename: Toshio
authors.initials: T
authors.lastname: Morioka
mesh_terms: D003198:Computer Simulation; D004867:Equipment Design; D008027:Light; D008962:Models, Theoretical; D012031:Refractometry / Q000295:instrumentation*; D012044:Regression Analysis; D012542:Scattering, Radiation