Method of and apparatus for the measurement of mode field radius

Details Method of and apparatus for the measurement of mode field radius Method of and apparatus for the measurement of mode field radius

1986-11-17

1988-07-26

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

G01N 2184

Patent

active

047596252

ABSTRACT:
Mode field radius in single-mode optical fibers is measured by the modulation of an optical beam by means of a spatial filter with radial-distribution of transmittivity of Gaussian type. Modulated beam intensity is measured in correspondence with the beam axis for different widths of the Gaussian curve, and the mode field radius is derived from both such intensity values and a parameter dependent on the Gaussian width.

REFERENCES:
patent: 4636071 (1987-01-01), Lowe et al.
patent: 4664516 (1987-05-01), Coppa et al.

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