Thulium-doped fiber amplifier using pump light for improving conversion efficiency in a S-band
AssigneeNippon Telegraph and Telephone Corporation
InventorsShinichi Aozasa, Hiroji Masuda, Tadashi Sakamoto, Makoto Shimizu, Yoshiki Nishida
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Abstract
An optical fiber amplifier with a high conversion efficiency, which is capable of using the pump light in the wavelength band that can be emitted by the laser diode, is formed by an amplification optical fiber containing thulium at least in a core, to which a signal light is to be entered, and a pump light input unit configured to enter at least one pump light with a wavelength in a range of 1320-1520 nm, or more preferably 1320-1480 nm, into the amplification optical amplifier.
Claims11
An optical fiber amplifier, comprising:
- an amplification optical fiber containing thulium at least in a core at a concentration not less than 3000 ppmwt, to which a signal light is to be entered;
- and
- a pump light input unit configured to enter at least one pump light with a wavelength in a range of 1320-1520 nm into the amplification optical amplifier.
An optical fiber amplifier, comprising:
- a plurality of amplification optical fibers each containing thulium at least in a core at a concentration not less than 3000 ppmwt, to which a signal light is to be entered, the plurality of amplification optical fibers being connected in series or in parallel;
- and
- a plurality of pump light input units each configured to enter at least one pump light with a wavelength in a range of 1320-1520 nm into a respective one of the amplification optical amplifiers.
Dependencies are inferred from the claim text.