US Patent 11754788 Multi-channel mode converters with silicon lenses

A multi-channel mode converter includes a lens array having a first lens and a second lens, a glass block coupled to the lens array, and a fiber assembly unit (FAU) array coupled to the glass block, the FAU array including a first fiber corresponding to the first lens, and a second fiber corresponding to the second lens. The FAU array provides for a corresponding number of fibers and lenses such that a specific single fiber corresponds to a specific single lens, there being a 1:1 relationship between fibers and lenses. A mode converter system comprises: a lens array comprising: a first silicon lens configured to convert a first mode between a first waveguide and a first fiber, and a second silicon lens configured to convert a second mode between a second waveguide and a second fiber, and a glass block coupled to the lens array and configured to provide an optical path for a first light beam corresponding to the first silicon lens and a second light beam corresponding to the second silicon lens.