Filter obtained by writing a Bragg grating into an optical fiber

Details Filter obtained by writing a Bragg grating into an optical fiber Filter obtained by writing a Bragg grating into an optical fiber

1997-02-28

1998-10-06

Ullah, Akm E.

Optical waveguides

With optical coupler

Particular coupling function

385 37, G02B 626, G02B 634

Patent

active

058189874

ABSTRACT:
An optical filter is formed by writing at least one long-period Bragg array into an optical fiber which is tapered to define two substantially adiabatic transition areas delimiting an intermediate area in which the long-period Bragg grating is written to produce codirectional coupling between two guided modes in the intermediate area at a wavelength that is a function of the period of the grating.

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patent: 5717799 (1998-02-01), Robinson
patent: 5718738 (1998-02-01), Kohnke et al.
Chao-Xiang Shi et al, "Mode Conversion Based on the Periodic Coupling by a Reflective Fiber Grating", Optics Letters, vol. 17, No. 23, 1 Dec. 1992, pp. 1655-1657.
F. Bilodeau et al, "Efficient, Narrowband LP01 LP02 Mode Convertors Fabricated in Photosensitive Fibre: Spectral Response", Electronics Letters, vol. 27, No. 8, 11 Apr. 1991, pp. 682-684.
S. J. Hewlett et al, "Cladding-Mode Coupling Characteristics of Bragg Gratings in Depressed-Cladding Fibre", Electronics Letters, vol. 31, No. 10, 11 May 1995, pp. 820-822.

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