Embedded apparatus to monitor simulated brillouin scattering from Raman amplifier in fiber optics transmission system
First Claim
1. An apparatus to monitor pump stability in a fiber optics transmission system, comprising:
- an optical pump source configured to transmit a signal in the fiber optics transmission system;
an optical amplifier configured to receive the signal and to amplify the signal based thereon; and
a monitoring circuit configured to compare reflection coefficients associated with one or more back reflections from the fiber optics transmission system during a detection window to a threshold to determine whether the one or more back reflections during the detection window indicate a stimulated Brillouin scattering (SBS) event undesirably caused by the optical pump source, a normal condition, or excessive back reflections that trigger at least one remedial action, wherein the detection window is a time period that is a value between 10 μ
s and 100 ms,wherein the SBS event is detected based on the one or more reflection coefficients being above the threshold during less than all of the detection window, and the excessive back reflections are detected based on the one or more reflection coefficients being above the threshold during all of the detection window.
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Accused Products
Abstract
The embedded apparatus disclosed herein may measure reflection coefficient values associated with back reflections in a fiber optics transmission system during a variable detection window to detect normal conditions, simulated Brillouin scattering (SBS), or excessive back reflections triggering remedial action. For example, the back reflections may indicate normal conditions if the reflection coefficients measured during an entire detection window remained below a threshold or a maximum reflection coefficient observed therein was below the threshold. Alternatively, the back reflections may trigger remedial action if the reflection coefficients measured in the entire detection window exceeded the threshold or a minimum reflection coefficient observed therein was above the threshold. Otherwise, the back reflections may indicate the SBS effect if the reflection coefficients measured during the detection window included points above and below the threshold or the minimum and maximum reflection coefficients observed therein were below and above the threshold.
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Citations
20 Claims
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1. An apparatus to monitor pump stability in a fiber optics transmission system, comprising:
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an optical pump source configured to transmit a signal in the fiber optics transmission system; an optical amplifier configured to receive the signal and to amplify the signal based thereon; and a monitoring circuit configured to compare reflection coefficients associated with one or more back reflections from the fiber optics transmission system during a detection window to a threshold to determine whether the one or more back reflections during the detection window indicate a stimulated Brillouin scattering (SBS) event undesirably caused by the optical pump source, a normal condition, or excessive back reflections that trigger at least one remedial action, wherein the detection window is a time period that is a value between 10 μ
s and 100 ms,wherein the SBS event is detected based on the one or more reflection coefficients being above the threshold during less than all of the detection window, and the excessive back reflections are detected based on the one or more reflection coefficients being above the threshold during all of the detection window. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method to monitor pump stability in a fiber optics transmission system, comprising:
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operating an optical pump source to transmit a signal in the fiber optics transmission system, wherein an optical amplifier receives the signal and amplifies based thereon; measuring, at a monitoring circuit, reflection coefficients associated with one or more back reflections from the fiber optics transmission system during a detection window; and comparing, at the monitoring circuit, the measured reflection coefficients associated with the one or more back reflections during the detection window to a threshold to determine whether the one or more back reflections during the detection window indicate a stimulated Brillouin scattering (SBS) event undesirably caused by the optical pump source, a normal condition, or excessive back reflections that trigger at least one remedial action, wherein the detection window is a time period that is a value between 10 μ
s and 100 ms,wherein the SBS event is detected based on the one or more reflection coefficients being above the threshold during less than all of the detection window, and the excessive back reflections are detected based on the one or more reflection coefficients being above the threshold during all of the detection window. - View Dependent Claims (12, 13, 14, 15)
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16. A non-transitory computer-readable storage medium having computer-executable instructions to monitor pump stability in a fiber optics transmission system recorded thereon, wherein executing the computer-executable instructions on a device causes the device to:
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operate an optical pump source to transmit a signal to an optical amplifier in the fiber optics transmission system, wherein the optical amplifier receives the signal and amplifies based thereon; measure reflection coefficients associated with one or more back reflections from the fiber optics transmission system during a detection window; and compare the measured reflection coefficients associated with the one or more back reflections during the detection window to a threshold to determine whether the one or more back reflections during the detection window indicate a stimulated Brillouin scattering (SBS) event undesirably caused by the optical pump source, a normal condition, or excessive back reflections that trigger at least one remedial action, wherein the detection window is a time period that is a value between 10 μ
s and 100 ms,wherein the SBS event is detected based on the one or more reflection coefficients being above the threshold during less than all of the detection window, and the excessive back reflections are detected based on the one or more reflection coefficients being above the threshold during all of the detection window. - View Dependent Claims (17, 18, 19, 20)
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Specification