Optical waveguides – Having particular optical characteristic modifying chemical... – Of waveguide core
Reexamination Certificate
2011-08-16
2011-08-16
Le, Uyen-Chau N (Department: 2874)
Optical waveguides
Having particular optical characteristic modifying chemical...
Of waveguide core
C065S399000
Reexamination Certificate
active
08000577
ABSTRACT:
The invention relates to an optical fiber comprising a gain medium which is equipped with: a core (22) which is formed from a transparent material and nanoparticles (24) comprising a doping element and at least one element for enhancing the use of said doping element; and an outer cladding (26) which surrounds the core. The invention is characterised in that the doping element is erbium (Er) and in that the enhancing element is selected from among antimony (Sb), bismuth (Bi) and a combination of antimony (Sb) and bismuth (Bi).According to the invention, one such fiber is characterised in that the size of the nanoparticles is variable and is between 1 and 500 nanometers inclusive, and preferably greater than 20 nm.
REFERENCES:
patent: 2003/0087742 (2003-05-01), Taylor
patent: 2003/0175003 (2003-09-01), Gasca et al.
patent: WO 01/99241 (2001-12-01), None
patent: WO 03/058776 (2003-07-01), None
patent: WO 03/079070 (2003-09-01), None
V. K.. Tikhomirov et al, “Fabrication and characterization of nanoscale, Er3+-doped, ultratransparent oxy-fluoride glass ceramics”, Applied Physics Letters, AIP, American Institute of Physics, Melville, NY, US, vol. 81, No. 11, Sep. 9, 2002, pp. 1937-1939, XP012031866.
Blanchandin Stéphanie
Chaneac Corinne
Collet Christine
De Monredon Sophie
Jolivet Jean-Pierre
Alcatel Lucent
Harness Dickey & Pierce
Le Uyen-Chau N
Prince Kajli
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