G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 6/02 (2006.01) H04B 10/18 (2006.01)
Patent
CA 2211820
The invention provides a stimulated Brillouin scattering suppressed optical fiber which is easy to be produced, has an almost zero chromatic dispersion over the entirety of an optical fiber in the lengthwise direction, and has a low light loss. That is, in an optical fiber having a property, by which the chromatic dispersion with respect to optical communication signals becomes zero, obtained by changing the relative refractive index difference of the optical fiber and core diameter in the same increase or decrease direction, the relative refractive index difference of the core and the core diameter R are changed in the lengthwise direction of the optical fiber, and the core diameter R is made smaller in line a decrease the relative refractive index difference of the core while the core diameter R is made larger in line with an increase of the refractive index difference, whereby the chromatic dispersion the designated wavelength band is made nearly equal to zero in the entirety of the optical fiber in the lengthwise direction.
L'invention est une fibre optique à diffusion de Brillouin simulée facile à fabriquer dans laquelle la dispersion chromatique est pratiquement nulle sur toute la longueur et dans laquelle les pertes de lumière sont faibles. Dans cette fibre optique à dispersion chromatique des signaux de communication lumineux nulle, la suppression de la dispersion chromatique étant obtenue en changeant la différence des indices de réfraction de la fibre optique et du coeur dans le même sens de croissance ou de décroissance, l'indice de réfraction du coeur et le diamètre du coeur R varient dans le sens de la longueur de la fibre optique; le diamètre du coeur R décroît ou croît selon que le diamètre du coeur R décroît ou croît, de sorte que la dispersion chromatique dans la bande de longueurs d'onde désirée devient presque nulle sur toute la longueur de la fibre optique.
Akasaka Youichi
Ohashi Masaharu
Akasaka Youichi
Freedman Gordon
Nippon Telegraph And Telephone Corporation
Ohashi Masaharu
The Furukawa Electric Co. Ltd.
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