C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
C03B 37/018 (2006.01) C03B 19/14 (2006.01) C03B 20/00 (2006.01) C03C 21/00 (2006.01) G02B 6/00 (2006.01)
Patent
CA 2042593
A first process of the invention comprises forming two constricted portions (28) at a quartz reaction tube (4), charging a solution of a compound of a rare earth element as a solution into the section between the constricted portions (28) for doping. By this, the doping concentration becomes uniform along the length of an optical fiber preform (30) with defects being rarely produced. This process does not involve any complicated operation. A second process of the invention comprises impregnating a solution in the form of a mist in a soot-like core glass (26) by which it becomes possible to control the doping concentration in high accuracy. A third process of the invention comprises impregnating a solution while controlling the concentration in response to a quantity of a transmitted laser beam through a soot-like core glass (26), by which the doping concentration is ensured independently of the density of the soot-like core glass. A fourth process of the invention comprises repeating formation of a soot-like core glass (26) at different temperatures, by which a distribution of a doping concentration along the radial direction of the core can be arbitrarily set.
Un premier processus de l'invention comprend la formation de deux parties comprimées (28) sur un tube de quartz à réaction (4), l'introduction d'une solution d'un composé d'un élément des terres rares dans la section située entre les parties comprimées (28) pour dopage. La concentration de l'élément dopant devient ainsi uniforme sur la longueur d'une préforme de fibre optique (30) rarement imparfaite. Ce processus ne comporte aucune opération complexe. Un deuxième processus de l'invention comprend l'imprégnation d'une solution sous forme de brume dans une couche de coeur (26) formée par dépôt de suies, permettant ainsi de contrôler avec précision la concentration de l'élément dopant. Un troisième processus de l'invention consiste à imprégner une solution, tout en contrôlant la concentration en réponse à une quantité d'un faisceau laser transmis au travers de la couche de coeur (26); la concentration de l'élément dopant est assurée indépendamment de la densité de la couche de coeur. Un quatrième processus de l'invention comprend la répétition de la formation de la couche de coeur (26) à différentes températures;on peut établir arbitrairement la distribution de la concentration de l'élément dopant le long de la direction radiale du coeur.
Arima Tadao
Okamura Kouji
Fetherstonhaugh & Co.
Fujitsu Limited
LandOfFree
Process for fabricating an optical fiber preform does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for fabricating an optical fiber preform, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for fabricating an optical fiber preform will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1573479