Back to results
US 9,413,462 B2Granted
Optical amplification repeater and optical transmission station
AssigneeFujitsu Limited
InventorMiki Onaka
Life of this patent
Estimating the term…
Abstract
An optical amplification repeater includes a first rare-earth-doped optical amplification medium which amplifies a first signal light to be transmitted to a downstream, a second rare-earth-doped optical amplification medium which amplifies a second signal light to be transmitted to an upstream, and a pump light split and guide unit configured to split a pump light transmitted together with any of the first and second signal lights and to guide the split pump light to each of the first and second rare-earth-doped optical amplification mediums.
Claims16
An optical amplification repeater comprising:
- a first rare-earth-doped optical amplification medium that amplifies a first signal light to be transmitted to a downstream;
- a second rare-earth-doped optical amplification medium that amplifies a second signal light to be transmitted to an upstream in a direction opposite to a direction of the downstream;
- and
- a pump light split and guide unit configured to split a pump light transmitted from an optical transmission line together with any of the first and second signal lights into a first split pump light and a second split pump light and to guide the first and second split pump lights to the first and second rare-earth-doped optical amplification mediums, respectively.
1 more element
An optical transmission station comprising:
- an optical transmitter configured to transmit a first signal light to a downstream;
- an optical receiver configured to receive a second signal light from an upstream;
- a pump light source configured to transmit a pump light together with the first signal light to an optical amplification repeater, the optical amplification repeater amplifying the first signal light and the second signal light by using individual rare-earth-doped optical amplification mediums, the pump light remotely and commonly pumping the respective rare-earth-doped optical amplification mediums;
- and
- an optical attenuator configured to attenuate the second signal light input to the optical receiver according to power of the pump light transmitted together with the first signal light.
2 more elements
Dependencies are inferred from the claim text.