Experimental Demonstration of on-chip Optical ParametricOscillation in Planar Tantalum Pentoxide Waveguides

摘要

Tantalum pentoxide ( Ta_2O_5) planar waveguides have recently been shown to possess unusually large nonlinearities, andnonlinear Kerr coefficient (n_2), leading to potential applications in nonlinear integrated optics, such as supercontinuumgeneration. In this paper, we report the experimental demonstration of a third-order susceptibility ( X~((3)) ) governed nonlinear optical parametric process within a 7 mm long planar tantalum pentoxide waveguide using a pump-probe configuration. When pumped at 800 nm, and seeded in the near infra-red (IR) the waveguides allow parametric conversion giving rise to signal photons in the visible spectrum. By seeding the parametric conversion process in the 1200 to 1600 nm IR telecoms range, we obtain continuously tunable output over the visible range (533 to 600 nm) from a single guide.