H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 10/17 (2006.01) H01S 3/067 (2006.01) H01S 3/10 (2006.01) H01S 3/16 (2006.01)
Patent
CA 2381650
An L-band optical amplifier has a rare earth doped gain medium including a filter distributed over a finite physical portion of the gain medium. The filter is distributed over between about 25 % to substantially the entire length of the gain medium. The distributed filter substantially eliminates out- of-band light emission (C-band ASE, 1520nm-1565nm) and thus improves the performance of L-band amplification (1565nm-1620nm). Examples of distributed filters include discrete type filters such as long period gratings, or continuous type filters such as rare earth doped, twin core fibers, non- adiabatically tapered fibers and coaxial resonant ring fibers.
L'invention concerne un amplificateur optique bande L pourvu d'un milieu de gain dopé aux terres rares comprenant un filtre réparti sur une partie physique finie de ce milieu de gain. Ledit filtre est réparti dans une plage variant entre environ 25 % et la quasi-totalité de la longueur dudit milieu de gain. Le filtre réparti élimine sensiblement les émissions de lumière hors bande (ESA bande C, 1520nm - 1565nm) et améliore ainsi les performances de l'amplification en bande L (1565nm - 1620nm). Parmi les exemples de filtres répartis, on trouve les filtres de type discret, tels que les filtres en réseau à période longue, ou les filtres de type continu, tels que les filtres dopés aux terres rares et les filtres à fibres à double coeur, à fibres à biseau non adiabatique et à fibres coaxiales à boucle de résonance.
Minelly John D.
Yadlowsky Michael J.
Corning Incorporated
Gowling Lafleur Henderson Llp
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