On-chip beam rotators, adiabatic mode converters, and waveplates through low-loss waveguides with variable cross-sections.

ABSTRACT: Photonics integrated circuitry would benefit considerably from the ability to arbitrarily control waveguide cross-sections with high precision and low loss, in order to provide more degrees of freedom in manipulating propagating light. Here, we report a new method for femtosecond laser writing of optical-fiber-compatible glass waveguides, namely spherical phase-induced multicore waveguide (SPIM-WG), which addresses this challenging task with three-dimensional on-chip light control. Fabricating in the heating regime with high scanning speed, precise deformation of cross-sections is still achievable along the waveguide, with shapes and sizes finely controllable of high resolution in both horizontal and vertical transversal directions. We observed that these waveguides have high refractive in

SUBMITTER: Sun B 

PROVIDER: S-EPMC9263149 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature