Capillary tube end face processing to reduce heating of fiber optic combiners

A method of manufacturing a light combiner assembly, the method comprising:

• providing a capillary tube that includes a tube body that defines an internal tube volume,
• wherein the tube body includes a non-tapered section, including a first end face, and a tapered section, including a second end face,
• wherein the first end face and the second end face are opposite longitudinal ends of the tube body that extend between an outer surface of the tube body and an inner surface of the tube body,
• wherein the tapered section tapers from a first outer tube diameter defined by the first end face to a second outer tube diameter defined by the second end face, and
• wherein the first end face is configured to direct backward propagating light in one or more directions;
• inserting a fiber bundle, comprising a plurality of fibers, into the internal tube volume,
• wherein the plurality of fibers have respective unstripped sections and respective stripped sections;
• and
• fusing the respective stripped sections to the tapered section of the capillary tube,
• wherein the one or more directions are directed away from the respective unstripped sections.