Method of and system for writing a bragg grating point by point

Details Method of and system for writing a bragg grating point by point Method of and system for writing a bragg grating point by point

1996-12-24

1998-06-16

Palmer, Phan T. H.

Optical waveguides

With optical coupler

Input/output coupler

385 10, 385 28, 385 33, 359563, 359569, G02B 634

Patent

active

057684545

ABSTRACT:
A system for writing a Bragg grating point-by-point in an optical waveguide includes an illumination system for producing a primary beam. It further includes a diffraction grating to receive the primary beam and to produce a zero order secondary beam and two symmetrical secondary beams of higher order and a focusing optical device for focusing the secondary beams onto a writing area of the waveguide. The diffraction grating and the focusing optical device define an intensity function of writing in the area of the guide including a central peak and two secondary peaks spaced from the central peak by a distance equal to the pitch of the grating.

REFERENCES:
patent: 5104209 (1992-04-01), Hill et al.
patent: 5367588 (1994-11-01), Hill et al.
patent: 5550654 (1996-08-01), Erdogan et al.
patent: 5604829 (1997-02-01), Bruesselbach
D. Z. Anderson et al, "Production of in-Fibre Gratings Using a Diffractive Optical Element", Electronics Letters, vol. 29, No. 6, Mar. 18, 1993, pp. 566-568.
N. H. Rizvi et al, "Excimer laser writing of submicrometer period Bragg gratings using phase-shifting mask projection", Electronics Letters, vol. 31, No. 11, 25 May 1995, pp. 901-902.
J. Martin et al, "Novel writing technique of long and highly reflective in-fibre gratings", Electronics Letters, vol. 30, No. 10 May 12, 1994.

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