Mode Transformation in Hybrid Waveguides Based on Lithium Niobate for Efficient Coupling to a Standard Single Mode Fiber.

Parfenov, M. V.; Agruzov, P. M.; Ilichev, I. V.; Usikova, A. A.; Shamrai, A. V.

Topology of a hybrid waveguide device, which performs an effective transformation of a standard gradient titanium in-diffused waveguide mode to a hybrid waveguide mode, is considered. With its help a rather large optical mode with size optimal for coupling with standard single-mode fibers can be converted to a mode with a smaller size. Two the most perspective materials for hybrid waveguide fabrication were considered: silicon and titanium dioxide. The theoretical analysis has shown that transformation efficiency of more than 99% is achievable for waveguide devices based on titanium dioxide with contact lithography resolution.

WAVEGUIDES; TITANIUM dioxide; SINGLE-mode optical fibers; SILICA; LITHIUM niobate; FIBERS; INTEGRATED optics

Technical Physics, 2023, Vol 68, Issue 11, p443

1063-7842

Academic Journal

10.1134/S1063784223900334