Method for aligning optical fiber connectors

Details Method for aligning optical fiber connectors Method for aligning optical fiber connectors

1985-01-28

1987-01-20

Lee, John

Optics: measuring and testing

Range or remote distance finding

With photodetection

350320, 356138, G02B 632

Patent

active

046376836

ABSTRACT:
A method for alignment of optical fiber connector halves, including the steps of securing a connector lens in a lens holder having a planar end face, forming a reference plane parallel to or coplanar with the planar face of the lens holder, and then positioning an optical fiber such that, if the reference plane is reflective, light launched into the lens from the fiber will be maximally reflected back into the fiber. In one disclosed embodiment of the invention, the lens holder planar surface and an end surface of the lens are ground and polished together to form a common reference plane. Three alternative approaches are disclosed for detecting light reflected back into the fiber. The first approach detects light in the fiber core by means of a beam-splitting mirror. The second approach relies on the detection of light in the fiber cladding material, which is minimized when the fiber is properly aligned with the lens. The third approach relies on a charge in the laser spectral and noise output when the fiber is properly aligned with the lens.

REFERENCES:
patent: 3829195 (1974-08-01), Rawson
patent: 4290667 (1981-09-01), Chown
patent: 4509827 (1985-04-01), Cowen et al.
Webster's Seventh New Collegiate Dictionary, Mass., G. & C. Merriam Co., 1971, "Interferometer".

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