L-band amplification with detuned 980nm pump

H - Electricity – 01 – S

Patent

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H01S 3/067 (2006.01) H01S 3/094 (2006.01) H01S 3/16 (2006.01)

Patent

CA 2362087

A method of operating an optical amplifier for improved gain and pump-to- signal conversion efficiency in a long wavelength spectral region (L-band) of the emission spectrum of a rare earth doped gain medium having a known pump absorption band involves the steps of providing an optical signal to the amplifier having a large-signal input power; and providing pumping light to the amplifier having a wavelength that is different from a center wavelength of the known pump absorption band for amplifying the optical signal. Signal gain and improved pump-to-signal conversion efficiency was demonstrated for an erbium L-band signal by detuning the pump between about ~0-30nm on either side of the pump band center wavelength of 979-980nm. An optical amplifier employing the described method is also disclosed.

La présente invention concerne un procédé de fonctionnement d'un amplificateur optique permettant d'obtenir une amélioration de gain et de l'efficacité de conversion de pompe à signal dans une région spectrale à longueur d'onde longue (bande L) du spectre d'émission d'un milieu de gain dopé aux terres rares ayant une bande d'absorption de pompage connue. Ledit procédé consiste à transmettre un signal optique à l'amplificateur ayant unehaute puissance d'entrée de signaux et à transmettre de la lumière de pompage à l'amplificateur ayant une longueur d'onde qui est différente d'une longueur d'onde centrale de la bande d'absorption de pompage connue afin d'amplifier le signal optique. L'amélioration de gain de signaux et de l'efficacité de conversion de pompe à signal a été démontrée pour un signal de bande L d'erbium par désaccord de la pompe d'environ ±0-30nm de chaque côté de la longueur d'onde centrale de la bande de pompage de 979-980nm. L'invention concerne également un amplificateur optique utilisant le procédé décrit.

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