Reducing an impact of backward light on laser combiner reliability with absorbers

A light combiner assembly, comprising:

• a plurality of fibers that form a fiber bundle, wherein the plurality of fibers have respective unstripped sections and respective stripped sections, wherein the plurality of fibers are configured to receive light from a plurality of respective light sources and combine the light into forward propagating light;
• and
• a non-tapered capillary tube that includes a first tube body that defines a first internal tube volume in which the plurality of fibers is arranged,
• wherein the respective stripped sections are fused to the first tube body,
• wherein the first tube body includes a first longitudinal end arranged proximate to the respective unstripped sections, and a second longitudinal end,
• wherein the first tube body includes one or more absorbers configured to absorb backward propagating light, and
• wherein the one or more absorbers are incorporated into one or more materials of the first tube body;
• and
• a tapered capillary tube that includes a second tube body that defines a second internal tube volume,
• wherein the second tube body is spliced to the second longitudinal end of the first tube body for receiving the forward propagating light from the non-tapered capillary tube.

A light combiner assembly, comprising:

• a plurality of fibers that form a fiber bundle, wherein the plurality of fibers have respective unstripped sections and respective stripped sections, wherein the plurality of fibers are configured to receive light from a plurality of respective light sources and combine the light into forward propagating light;
• and
• a capillary tube that includes a tube body that defines an internal tube volume in which the plurality of fibers is arranged,
• wherein the tube body includes a non-tapered section, including a first longitudinal end arranged proximate to the respective unstripped sections, and a tapered section, including a second longitudinal end, arranged around the respective stripped sections and to which the respective stripped sections are fused,
• wherein the tapered section tapers from a first tube diameter of the non-tapered section to a second tube diameter of the second longitudinal end,
• wherein the tube body includes one or more light stripping elements configured to interact with backward propagating light to reduce an amount of the backward propagating light that reaches the respective unstripped sections, and
• wherein the one or more light stripping elements are incorporated into one or more materials of the tube body.