Method for constructing well structures for hybrid optical waveguide and the optical waveguide

Abstract

A well may be formed for access to an optical waveguide core by a process that results in an L-shaped well. The L-shaped well may then be filled with a polymer. By controlling the size of each portion of well, the occurrence of bubbles within the well and cuts to the core may be reduced.

Description

technical field [0001] The present invention generally relates to well-shaped hole structures for hybrid optical waveguides. Background technique [0002] An optical waveguide is a structure that transmits optical signals. In general, an optical waveguide may include an optical core surrounded by upper cladding and lower cladding. Most optical signals are typically transmitted in the optical core along the axis of the waveguide structure. [0003] In order to access the optical core, a well-shaped hole may be formed through the upper cladding. This well-shaped hole is formed by etching the upper cladding. Sometimes, such etching does not fully expose the optical core of the waveguide, resulting in reduced access to the optical signal. In other cases, the waveguide core is not only exposed but may also be damaged by the etching process, resulting in reduced optical signal transmission. [0004] After the well-shaped hole is formed, polymer can be filled into the well-sha...

AI Technical Summary

Problems solved by technology

If the wells are not formed properly, voids may form in the wells where they cannot be completely filled with polymer, also resulting in reduced optical signal transmission

Images