EMBEDDED APPARATUS TO MONITOR SIMULATED BRILLOUIN SCATTERING FROM RAMAN AMPLIFIER IN FIBER OPTICS TRANSMISSION SYSTEM

摘要

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.

主权项

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 and amplify the signal; 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 simulated Brillouin scattering (SBS) event, a normal condition, or excessive back reflections that trigger at least one remedial action.