Optical fiber amplifier

Details Optical fiber amplifier Optical fiber amplifier

H - Electricity

01

S

H01S 3/102 (2006.01) G02B 6/26 (2006.01) H01S 3/067 (2006.01) H01S 3/13 (2006.01) H01S 3/131 (2006.01)

Patent

CA 2096179

Pumping light from an optical pumping source is incident on an Er-doped fiber through a multiplexer to pump Er. When signal light is incident on the Er-doped fiber through the multiplexes in this state, the signal light is amplified by stimulated emission of pumped Er. This amplified signal light is attenuated by a high-loss optical fiber and is output externally through a splitter and the like. Meanwhile, part of the amplified signal light is fed back to a driving source of the optical pumping source through the splitter so as to be used to adjust the gain of the optical fiber amplifier. With this operation, the output signal power is kept constant. In this case, since the high-loss optical fiber is connected to the output terminal of the Er-doped fiber, the noise figure of the optical f fiber amplifier can be kept small over a wide range of input light intensities.

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