Experimental demonstration of intermodal nonlinear effects between full vectorial modes in a few moded fiber

Experimental demonstration of intermodal nonlinear effects between full vectorial modes in a few moded fiber.

We experimentally investigate intermodal nonlinear interactions, such as Raman scattering and four wave mixing. The fiber used is a specially designed few moded fiber, which splits the degeneracy of the first mode group, leading to stable propagation of the two full vectorial modes, TM01 and TE01. For the Raman experiments pumping occur in either the fundamental mode or the two full vectorial m...

Intermodal Nonlinear Effects between Full Vectorial Modes in Few Moded Fiber

We experimentally investigate intermodal nonlinear mixing, such as Raman and four wave mixing. This is obtained by pumping in the fundamental mode, or either of the two full vectorial modes, TM01 and TE01 in a specialty designed few moded fiber. © 2013 Optical Society of America OCIS codes: 190.4370 (Nonlinear optics, fibers); 190.5650 (Raman effect); 190.4223 (Nonlinear wave mixing) In past ye...

Experimental demonstration of nonlinear pulse propagation in a fiber Bragg grating written in a fiber amplifier.

We study experimentally nonlinear propagation of sub-nanosecond optical pulses in a fiber Bragg grating written in a Ytterbium-doped fiber amplifier (YD-FBG). The magnitude and the sign of group velocity dispersion (GVD) in YD-FBG can be controlled by adjusting the fiber tension. In the case of anomalous GVD, pulse breakup was observed due to modulation instability. However, for the same input ...

Complex modes and instability of full-vectorial beam propagation methods.

Full-vectorial beam propagation methods (FVBPMs) are widely used to model light waves propagating in high-index-contrast optical waveguides. We show that the paraxial FVBPM and wide-angle FVBPMs based on diagonal Padé approximants are analytically unstable for waveguides with complex modes. The instability cannot be removed by enlarging the computational domain, increasing the numerical resolut...

Modal testing of nonlinear vibrating structures based on nonlinear normal modes Experimental demonstration