G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 5/26 (2006.01) G02B 6/124 (2006.01) H04B 10/18 (2006.01)
Patent
CA 2219530
A method of avoiding phase discontinuities between adjacent sections of a long Bragg grating written section-by-section in an optical fibre uses masks with alignment parts additional to their writing parts. Each alignment part is a replica of a portion of the writing part of the adjacent mask. The writing of the Bragg grating produces an associated absorption grating and so, for light directed in series through the alignment part of the mask and the already-written previous section of the grating, transmission is at a maximum when the mask is moved into exact registry. Fine adjustment of mask position is made to find this condition before writing with this mask is commenced.
Méthode permettant d'éviter les discontinuités de phase entre des sections adjacentes d'un long réseau de Bragg enregistré section par section dans une fibre optique. La méthode utilise des masques comprenant des parties alignement qui s'ajoutent à leurs parties enregistrement. Chaque partie alignement est une réplique d'une portion de la partie enregistrement du masque adjacent. L'enregistrement du réseau de Bragg produit un réseau d'absorption associé, de sorte que la lumière dirigée en série à travers la partie alignement du masque et la section déjà enregistrée du réseau est transmise à un niveau maximum lorsque le masque est déplacé dans le registre exact. Le réglage fin de la position du masque permet de réaliser cette condition avant de commencer l'enregistrement au moyen du masque.
Donnelly Victoria
Nortel Networks Limited
Northern Telecom Limited
LandOfFree
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