Method and device for measuring coupling losses in single...

Details Method and device for measuring coupling losses in single... Method and device for measuring coupling losses in single...

G - Physics

01

N

73/57

G01N 21/84 (2006.01) G01M 11/00 (2006.01)

Patent

CA 1264960

Abstract A method and apparatus are provided for measuring optical coupling losses between single-mode optical fibres, wherein an optical beam is injected into a length of optical fibre, the optical beam exiting from a fibre end face being reflected by a reflecting optical system back into said fibre through said face, and re- emerging its injection point, and wherein the optical power of the reflected beam is measured, under a reference condition in which the core portion of the end face and its image produced by the optical beam reflected by the reflecting optical system coincide at the optical centre of the reflecting optical system, as well as under conditions of transverse or longitudinal offset from the reference condition. Various types of reflecting optical systems and arrangements for aligning the apparatus prior to a measurement are described.

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