Femtosecond Time Division Interferometry Technique for Measuring the TensorComponents of X(3)

摘要

We describe a new femtosecond time division interferometry technique forcharacterizing nonlinear index changes from different components of the X(3) tensor. Pump probe interferometric measurements of nonlinear phase are performed using a time division multiplexed reference pulse. The n sub 2 parallel and n sub 21 components of the nonlinear index are measured by permuting the polarizations of the pulses and using a novel differential detection and modulation scheme. Measurements are demonstrated in an optical fiber.