Method and apparatus for writing Bragg gratings on strained opti

Details Method and apparatus for writing Bragg gratings on strained opti Method and apparatus for writing Bragg gratings on strained opti

1996-07-03

1998-07-28

Ngo, John

Optical waveguides

With optical coupler

Input/output coupler

385147, 359900, G02B 626

Patent

active

057872139

ABSTRACT:
In accordance with the present invention, gratings are written on an optical fiber while the fiber is under a controlled amount of strain provided by two-point bending. When the strain is relaxed, the regions of perturbation become narrower as the fiber contracts and the spacing becomes smaller. The advantage of two-point bending as compared with tension is that the strain is precisely controllable and reproducible.

REFERENCES:
patent: 5061032 (1991-10-01), Meltz et al.
J.B. Murgatroyd, "The Strength of Glass Fibres. Part II. The Effect of Heat Treatment on Strength", Journal of the Society of Glass Technology, pp. 388-405, (1944).
M.J. Matthewson et al., "Strength Measurement of Optical Fibers by
P.W. France, et al., "Liquid Nitrogen Strengths of Coated Optical Glass Fibres", Journal of Materials Science 15, pp. 825-830, (1980).
P.W. France, et al., "Strength and Fatigue of Multicomponent Optical Glass Fibres", Journal of Materials Science, 18, pp. 785-792, (1983).

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