Parallelized Optical Link Calibration for OMS
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional optical link calibration in optical multiplex sections (OMS) is sequential, which scales poorly as the number of spans increases, leading to significantly longer calibration times.
Innovation Solution
Divide the OMS into sub-sections and perform parallelized optical link calibration by isolating these sub-sections using existing equipment, such as Variable Optical Attenuators (VOAs) and optical amplifiers, allowing measurements to be taken simultaneously across multiple sub-sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sequential calibration is performed span by span, then stable and known spectrum requirements are met for each span under test, but calibration time increases linearly with span count
Solution Approach 1:
The optical section is divided into multiple isolated sub-sections, allowing calibration measurements to be performed in parallel across multiple sub-sections simultaneously, rather than sequentially one span at a time
Solution Approach 2:
Variable optical attenuators and optical amplifiers are used as intermediary devices to isolate sub-sections from each other while maintaining the necessary optical signal levels and spectral characteristics for parallel calibration measurements
2Adaptability or versatility
If the number of spans in an OMS increases, then network capacity and coverage are improved, but calibration time increases linearly with span count
Solution Approach 1:
By segmenting the optical section into isolated sub-sections, the calibration process can scale to accommodate increasing numbers of spans without linearly increasing calibration time, as multiple sub-sections can be calibrated simultaneously
Solution Approach 2:
The calibration process transitions from a one-dimensional sequential approach (calibrating spans in order) to a multi-dimensional parallel approach where multiple sub-sections are calibrated simultaneously across different spatial segments
Data Source
AI summary
A method of parallelized optical link calibration of an optical section having a plurality of spans interconnecting a transmit Optical Add/Drop Multiplexer (OADM) with a receive OADM via a plurality of line amplifiers includes partitioning the optical section into a plurality of sub-sections, each including one or more spans of the plurality of spans; utilizing equipment at the plurality of line amplifiers to isolate the plurality of sub-sections from one another; and performing measurements of spans for the parallelized optical link calibration in some or all of the plurality of sub-sections at a same time. Advantageously, timing of the parallelized optical link calibration is independent of a number of spans in the optical section.