Method of and device for measuring return losses in optical fibe

Details Method of and device for measuring return losses in optical fibe Method of and device for measuring return losses in optical fibe

1998-01-22

1999-01-26

Font, Frank G.

Optics: measuring and testing

By particle light scattering

With photocell detection

356349, 356 731, G01B 902, G01N 2100

Patent

active

058644008

ABSTRACT:
A method of and an apparatus for measuring return loss in an optical fiber component. Radiation of a predetermined wavelength, e.g. from a laser, is launched into an optical fiber component, preferably through an optical fiber having a polarization control loop and the radiation reflected and the direct radiation are subjected to phase modification. An amplitude of the frequency component of the detected signal at the frequency imposed by phase modulation is measured and is used as the basis for evaluating the return loss.

REFERENCES:
patent: 5321501 (1994-06-01), Swanson et al.
patent: 5473428 (1995-12-01), Lee et al
"Laser Diode Feedback Interferometer For Measurement of Displacements Without Ambiguity", Silvano Donati et al, IEEE Journal OF Quatum Electronics, vol. 31,No. 1, Jan. 1995, 7pages.

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