Gain equalization apparatus and method for equalizing gain
AssigneeNEC Corporation
InventorMotoyoshi Kawai
Life of this patent
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Abstract
A gain equalization apparatus according to an example embodiment includes a first path including a gain equalizer configured to correct a tilt of an input optical signal, a second path including a through-fiber configured to transmit the input optical signal therethrough as it is, an optical switch capable of switching between the first path including the gain equalizer and the second path including the through-fiber, at least one memory configured to store instructions, and at least one processor configured to execute the instructions to control the switching of the optical switch. By this configuration, a gain equalization apparatus and a method for equalizing a gain capable of reducing power consumption and suppressing an increase in optical loss while improving reliability are provided.
Claims6
A gain equalization system comprising:
- a first gain equalization apparatus;
- and
- a second gain equalization apparatus, wherein,
- the first gain equalization apparatus comprises:
- a first path including a gain equalizer configured to correct a tilt of an input optical signal;
- a second path including a through-fiber configured to transmit the input optical signal therethrough as it is;
- an optical switch capable of switching between the first path including the gain equalizer and the second path including the through-fiber;
- at least one memory configured to store instructions;
- and
- at least one processor configured to execute the instructions to control the switching of the optical switch, and
- the second gain equalization apparatus comprises a fourth path including a gain equalizer configured to correct a tilt of an input optical signal in a land terminal station, wherein the gain equalizer in the fourth path corrects a tilt of an optical signal output from the second path in a case where the second path is used.
A method performed by a second gain equalization apparatus connected to a first gain equalization apparatus via an optical fiber, comprising:
- performing a gain equalization process for correcting a tilt of an input optical signal, and outputting the resultant signal;
- and
- outputting, in a predetermined case, the input optical signal as it is without performing the gain equalization process, wherein
- the first gain equalization apparatus comprises a first path including a gain equalizer configured to correct a tilt of an input optical signal, a second path including a through-fiber configured to transmit the input optical signal as it is, and an optical switch capable of switching between the first path and the second path, and
- the second gain equalization apparatus comprises a fourth path provided in a land terminal station and including a gain equalizer configured to correct a tilt of an input optical signal output from the optical fiber, and wherein the gain equalizer in the fourth path corrects a tilt of an optical signal output from the second path in a case where the second path is used.
A non-transitory computer readable medium storing a program for causing a computer provided in a second gain equalization apparatus connected to a first gain equalization apparatus via an optical fiber, to execute the following processing of:
- performing a gain equalization process for correcting a tilt of an input optical signal, and outputting the resultant signal;
- and
- outputting, in a predetermined case, the input optical signal as it is without performing the gain equalization process, wherein
- the first gain equalization apparatus comprises a first path including a gain equalizer configured to correct a tilt of an input optical signal, a second path including a through-fiber configured to transmit the input optical signal as it is, and an optical switch capable of switching between the first path and the second path, and
- the second gain equalization apparatus comprises a fourth path provided in a land terminal station and including a gain equalizer configured to correct a tilt of an input optical signal output from the optical fiber, and wherein the gain equalization process causes the gain equalizer in the fourth path to correct a tilt of an optical signal output from the second path in a case where the second path is used.
Dependencies are inferred from the claim text.