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US 5,563,733 AGranted
Optical fiber amplifier and optical fiber transmission system
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMasahiro Mitsuda, Jun Ohya, Tomoaki Uno
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Abstract
An optical fiber amplifier for optically amplifying a plurality of signals having different wavelengths includes a series of rare earth doped optical fibers and at least one pump light source generating pump light for exciting the series of rare earth doped optical fibers. A first signal among the plurality of signals propagates through a part of the series of rare earth doped optical fibers, and a second signal among the plurality of signals propagates through all of the series of rare earth doped optical fibers.
Claims23
An optical fiber amplifier for optically amplifying a plurality of signals having different wavelengths, comprising a series of rare earth doped optical fibers and at least one pump light source generating pump light for exciting the series of rare earth doped optical fibers,
- wherein a first signal among the plurality of signals propagates through a part of the series of rare earth doped optical fibers, and a second signal among the plurality of signals propagates through all of the series of rare earth doped optical fibers,
- wherein each of the series of rare earth doped optical fibers is pumped so that the first signal has a gain higher than a gain of the second signal.
A bidirectional optical fiber amplifier comprising:
- a first input/output section for at least outputting a first signal and receiving a second signal;
- a second input/output section for at least receiving the first signal and outputting the second signal;
- an optical fiber amplifying section connected to the first and second input/output sections, the optical fiber amplifying section optically amplifying a plurality of signals having different wavelengths, and comprising a series of rare earth doped optical fibers and at least one pump light source generating pump light for exciting the series of rare earth doped optical fibers, a first signal among the plurality of signals propagating through a part of the series of rare earth doped optical fibers, while a second signal among the plurality of signals propagating through all of the series of rare earth doped optical fibers;
- wherein each of the series of rare earth doped optical fibers is pumped so that the first signal has a gain higher than a gain of the second signal;
- and
- dividing means for selectively transmitting the first signal received from the optical fiber amplifying section to the first input/output section.
3 more elements
An optical fiber transmission system comprising:
- a transmitting station including a first signal light source for emitting a first signal and a first light receiver for detecting a second signal;
- a receiving station including a second light receiver for detecting the first signal and a second signal light source for emitting the second signal;
- an optical fiber transmission route for connecting the transmitting station and the receiving station;
- and
- an optical fiber amplifier disposed midway of the optical fiber transmission route,
- to wherein the optical fiber amplifying section optically amplifies a plurality of signals having different wavelengths, the section comprising a series of rare earth doped optical fibers and at least one pump light source generating pump light for exciting the series of rare earth doped optical fibers,
- wherein each of the series of rare earth doped optical fibers is pumped so that the first signal has a gain higher than a gain of the second signal, and
- a first signal among the plurality of signals propagates through a part of the series of rare earth doped optical fibers, and a second signal among the plurality of signals propagates through all of the series of rare earth doped optical fibers.
5 more elements
An optical fiber transmission system comprising:
- a transmitting station including a first signal light source for emitting a first signal and a first light receiver for detecting a second signal;
- a receiving station including a second light receiver for detecting the first signal and a second signal light source for emitting the second signal;
- a bidirectional optical fiber transmission route for connecting the transmitting station and the receiving station;
- and
- an optical fiber amplifier disposed midway of the optical fiber transmission route,
- wherein the bidirectional optical fiber includes:
- a first input/output section for at least outputting a first signal and receiving a second signal;
- a second input/output section for at least receiving the first signal and outputting the second signal;
- an optical fiber amplifying section connected to the first and second input/output sections, the optical fiber amplifying section optically amplifying a plurality of signals having different wavelengths, and comprising a series of rare earth doped optical fibers and at least one pump light source generating pump light for exciting the series of rare earth doped optical fibers, a first signal among the plurality of signals propagating through a part of the series of rare earth doped optical fibers, while a second signal among the plurality of signals propagating through all of the series of rare earth doped optical fibers
- wherein each of the series of rare earth doped optical fibers is pumped so that the first signal has a gain higher than a gain of the second signal;
- and
- dividing means for selectively transmitting the first signals received from the optical fiber amplifying section to the first input/output section.
9 more elements
Dependencies are inferred from the claim text.