Molecular bonded fiber optic couplers and method of fabrication

Details Molecular bonded fiber optic couplers and method of fabrication Molecular bonded fiber optic couplers and method of fabrication

G - Physics

02

B

88/97.5

G02B 6/28 (2006.01)

Patent

CA 1264582

MOLECULAR BONDED FIBER OPTIC COUPLERS AND METHOD OF FABRICATION Abstract of the Disclosure A fiber optic coupler is formed by heating juxtaposed optically flat surfaces formed on two lengths of optical fiber to the glass transition temperature. The fibers bond together while preserving the molecular composition of the fibers at bonded region. Depending upon the depth to which the fibers are lapped to form the optically flat surfaces, the coupler may be either an evanescent field coupler or a core intercept coupler. The fibers may be mounted on curved substrates and then lapped to form the optically flat surfaces. The optical throughput of a fiber may be monitored during assembly of a coupler to permit adjustment of the positions of the optically flat surfaces to produce a desired coupling efficiency. The fibers may then be bonded together by application of energy from a suitable coherent light source such as a CO2 laser.

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