Raman amplifier, raman amplification method, and raman amplification system
AssigneeFujitsu Limited
InventorsGOJI NAKAGAWA, Teppei Ohata
Life of this patent
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Abstract
A Raman amplifier includes a first light source that outputs a primary pumping light, which propagates in a same direction as a propagation direction of a signal light, to an optical transmission line for Raman amplification, a second light source that outputs a secondary pumping light, which pumps and amplifies the primary pumping light and propagates in the same direction as the propagation direction, to the optical transmission line, and a control unit that controls a gain for the signal light by adjusting power of the secondary pumping light.
Claims11
A Raman amplifier comprising:
- a first light source that outputs a primary pumping light, which propagates in a same direction as a propagation direction of a signal light, to an optical transmission line for Raman amplification;
- a second light source that outputs a secondary pumping light, which pumps and amplifies the primary pumping light and propagates in the same direction as the propagation direction, to the optical transmission line;
- and
- a control unit that controls a gain for the signal light by adjusting power of the secondary pumping light.
A Raman amplification method comprising:
- outputting a primary pumping light and a secondary pumping light to an optical transmission line for Raman amplification, the primary pumping light propagating in a same direction as a propagation direction of a signal light, the secondary pumping light amplifying the primary pumping light and propagating in the same direction as the propagation direction;
- and
- controlling a gain for the signal light by adjusting power of the secondary pumping light.
A Raman amplification system comprising:
- a first Raman amplifier including:
- a first light source that outputs a primary pumping light, which propagates in a same direction as a propagation direction of a signal light, to an optical transmission line for Raman amplification,
- a second light source that outputs a secondary pumping light, which pumps and amplifies the primary pumping light and propagates in the same direction as the propagation direction, to the optical transmission line, and
- a forward control unit that controls a gain for the signal light by adjusting power of the secondary pumping light;
- and
- a second Raman amplifier including:
- a third light source that outputs another primary pumping light propagating in a direction opposite to the propagation direction, and
- a backward control unit that controls the gain for the signal light by adjusting power of the another primary pumping light.
Dependencies are inferred from the claim text.