Patent ID: 9690055
Date: 2017-06-27
CPC Classifications: B32B,G02B

Claim:
1. A method of securing a bare fiber section within a longitudinal bore of a ferrule having a front end and a back end, wherein the ferrule comprises a ceramic material, and wherein at least a portion of the front end of the ferrule is spaced apart from a back optical surface of a reference optical system by a distance d s in the range 5 μm≦d s ≦15 μm, the method comprising: inserting the bare fiber section into the longitudinal bore of the ferrule from the back end to the front end until an endface of the bare fiber section contacts the back optical surface of the reference optical system such that the bare fiber section protrudes from the front end of the ferrule by the distance d introducing a photoactivated adhesive into the longitudinal bore, wherein the photoactivated adhesive occupies at least a portion of a region within the longitudinal bore defined by the inner wall of the longitudinal bore and the bare fiber section disposed therein, and further wherein the photoactivated adhesive is activated when exposed to an activating light; and focusing the activating light at a focus position in front of the front end of the ferrule to form a diverging beam of the activating light that passes through the reference optical system and enters the endface of the bare fiber section while the bare fiber section remains protruding from the front end of the ferrule by the distance d wherein the activating light is generated by a diode laser with an operating wavelength in the range from 200 nm to 600 nm.