Writing diffraction gratings with interference fringe patterns

Details Writing diffraction gratings with interference fringe patterns Writing diffraction gratings with interference fringe patterns

1997-01-24

1998-10-13

Palmer, Phan T. H.

Optical waveguides

With optical coupler

Input/output coupler

385 10, 385 31, 359566, 359900, G02B 634

Patent

active

058224793

ABSTRACT:
A progressive method of writing a long grating in a substrate using a pulsed interference fringe pattern. The substrate is moved through the fringe pattern while being continuously illuminated with light of a different wavelength to produce a diffracted beam whose phase is monitored to produce a control signal that regulates the pulsing of the writing beam to ensure that the fringe pattern is present only when it is in correct registry with the grating being written.

REFERENCES:
patent: 5066133 (1991-11-01), Brienza
patent: 5216739 (1993-06-01), Hill et al.
patent: 5652818 (1997-07-01), Byron
Kashyap et al Super-step-chirped fibre Bragg gratings Electronics Letters 18 Jul. 1996 vol. 32 No. 15 Published in GB.

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