Method for monitoring wavelength-division multiplexed signal
First Claim
1. A method for monitoring a wavelength-division multiplexed signal, comprising:
- generating from a first node, a first optical objective signal including a first objective wavelength λ
o1,generating from a second node, a second optical objective signal including a second objective wavelength λ
o2, andgenerating from a monitor, an optical guard signal including a guard wavelength λ
g that is between λ
o1 and λ
o2;
a central hub receiving the first optical objective signal, the second optical objective signal, and the optical guard signal;
the central hub generating the wavelength-division multiplexed signal by wavelength-division multiplexing the first optical objective signal, the second optical objective signal, and the optical guard signal,wherein the wavelength-division multiplexed signal includes;
a first multiplexed objective channel,a second multiplexed objective channel, anda multiplexed guard channel having a range of wavelengths between λ
o1 and λ
o2;
receiving the wavelength-division multiplexed signal by the monitor; and
detecting an error of the first multiplexed objective channel by determining an error of the multiplexed guard channel, determining the error includes comparing the multiplexed guard channel to the optical guard signal.
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Abstract
A method for monitoring wavelength-division multiplexed (WDM) signal for detecting signal drift of objective signals, including generation of one or more objective signals and a guard signal. The guard signal has a wavelength that is within a range defined by a guard channel. The first and second objective signals and the guard signal are wavelength-division multiplexed to generate a wavelength-division multiplexed signal. The first objective signal, the second objective signal, and the guard signal are assigned to a first multiplexed objective channel, a second multiplexed objective channel, and a multiplexed guard channel, respectively. The wavelength-division multiplexed signal is received by a monitor and then the error rate of the multiplexed guard channel is determined.
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Citations
10 Claims
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1. A method for monitoring a wavelength-division multiplexed signal, comprising:
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generating from a first node, a first optical objective signal including a first objective wavelength λ
o1,generating from a second node, a second optical objective signal including a second objective wavelength λ
o2, andgenerating from a monitor, an optical guard signal including a guard wavelength λ
g that is between λ
o1 and λ
o2;a central hub receiving the first optical objective signal, the second optical objective signal, and the optical guard signal; the central hub generating the wavelength-division multiplexed signal by wavelength-division multiplexing the first optical objective signal, the second optical objective signal, and the optical guard signal, wherein the wavelength-division multiplexed signal includes; a first multiplexed objective channel, a second multiplexed objective channel, and a multiplexed guard channel having a range of wavelengths between λ
o1 and λ
o2;receiving the wavelength-division multiplexed signal by the monitor; and detecting an error of the first multiplexed objective channel by determining an error of the multiplexed guard channel, determining the error includes comparing the multiplexed guard channel to the optical guard signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification