Optical: systems and elements – Optical amplifier – Optical fiber
Reexamination Certificate
2007-01-02
2007-01-02
Keith, Jack (Department: 3663)
Optical: systems and elements
Optical amplifier
Optical fiber
Reexamination Certificate
active
11008963
ABSTRACT:
An optical amplifier is provided with a controlling unit for controlling a gain of the optical amplifier based on input light power and output light power of the optical amplifier, as well as a gain control amount variable unit for changing the gain control amount of the optical amplifier by the controlling unit according to at least one of the input light power and the output light power. Thereby, optical communication, which can follow the change in the input power of the optical amplifier in high speed and also is stable, can be realized, without causing the occurrence of an oscillation phenomenon, the large size of the optical amplifier, and the increase in power consumption and heating.
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Lelic, et al. “Smart EDFA with Embedded Control”, The 14thAnnual Meeting of IEEE Lasers & Electro-Optics Society (LEOS 2001), Conference Proceedings, 2001, vol. 2, Nov. 2001, pp. 419-420.
K. Motoshima, et al., “A Channel-Number Insensitive Erbium-Doped Fiber Amplifier with Automatic Gain and Power Regulation Function”, Journal of Lightwave Technology, vol. 19, No. 11, Nov. 2001, pp. 1759-1767.
Koganei Yohei
Koizumi Nobukazu
Oota Masato
Bolda Eric
Fujitsu Limited
Keith Jack
Staas & Halsey , LLP
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