We study nonlinear modes of dual-core photonic crystal fiber couplers made of a material with the focusing Kerr nonlinearity. We find numerically the profiles of symmetric, antisymmetric, and asymmetric nonlinear modes and analyze all-optical switching generated by the instability of the symmetric mode. We also describe elliptic spatial solitons controlled by the waveguide boundaries.
© 2005 Optical Society of America
José R. Salgueiro and Yuri S. Kivshar, "Nonlinear dual-core photonic crystal fiber couplers," Opt. Lett. 30, 1858-1860 (2005)