Patent ID: 8727640

Claim:
An optical coupler of a fiber optic system comprising: a light-source input cavity packaged in an outer casing, wherein the light-source input cavity receives an optical signal from a light source; an optical collimator packaged in the outer casing such that a receiving end of the optical collimator receives the light source from the light-source input cavity, wherein the optical collimator comprises at least one beam forming stage, wherein the optical collimator generates a collimated beam output from the optical signal; and an optical cavity that receives the collimated beam output of the optical collimator, wherein the optical cavity is coaxially included in a receiving optical fiber coupled with the outer casing, coupled with the optical cavity, wherein the optical cavity receives the collimated beam output of the optical collimator and inputs the collimated beam into the receiving optical fiber, wherein the input collimated beam is parallel to the longitudinal direction of the optical fiber receiving cavity's core, and wherein the light source, a package substrate containing the light source and the input end of the optical fiber receiving cavity are all concentrically located completely within the confines of the outer casing of a single packaging unit.