Minnesota Mining and Manufacturing Company

Dwayne LaBrake

James Francis Brennan, Iii

Ronald Phillip Pepin

Gerard A Beauchesne

A method and an apparatus for writing apodized Bragg gratings into an optical fiber. The method includes the steps of providing a photosensitive optical fiber and a writing beam. A periodic intensity distribution of period .LAMBDA. is created from the writing beam and the optical fiber is translated relative to the intensity distribution at a velocity v(t). The intensity of the writing beam is modulated as a function of time at a frequency f(t), where ##EQU1## The intensity of the writing beam is varied further to control the envelope of the refractive index profile to write apodized gratings.

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Austin, TX, United States of America

Dwayne LaBrake