We present modulation instability analysis including azimuthal perturbations of steady-state continuous wave (CW) propagation in multicore-fiber configurations with a central core. In systems with a central core, a steady CW evolution regime requires power-controlled phase matching, which offers interesting spatial-division applications. Our results have general applicability and are relevant to a range of physical and engineering systems, including high-power fiber lasers, optical transmission in multicore fiber, and systems of coupled nonlinear waveguides.
© 2013 Optical Society of America
Original Manuscript: August 5, 2013
Manuscript Accepted: August 30, 2013
Published: October 14, 2013
A. M. Rubenchik, E. V. Tkachenko, M. P. Fedoruk, and S. K. Turitsyn, "Power-controlled phase-matching and instability of CW propagation in multicore optical fibers with a central core," Opt. Lett. 38, 4232-4235 (2013)