This testing solution is based on the multichannel OTDR method invented by Special Honorary Professor Masataka Nakazawa of Tohoku University. By synchronizing multiple optical time-domain reflectometers (OTDRs), this method measures both transmission and return losses in multicore fibers, as well as measuring and visualizing the inter-core crosstalk distribution along the fiber.
Equipped with four OTDR channels, this solution offers powerful support for applications such as verifying optimal installation conditions during R&D, as well as high-speed inspection tasks required in manufacturing.
Development Background:
The recent proliferation of artificial intelligence and cloud services has driven a continuous increase in the transmission capacity of optical communications connecting submarine cables and data centers. However, the transmission capacity of conventional optical fiber is reaching its limits.
As a solution, multicore fibers, which allow multiple independent cores (optical transmission paths) within a single fiber, are gaining prominence.
Research on multicore fibers has been ongoing since the 2000s. Anritsu has collaborated with Tohoku University, a pioneer in this field, to develop measurement methods based on multichannel OTDRs. For the practical application of these fibers, quality assessment is required, including crosstalk between cores and high-speed inspection technologies.
To meet these market needs, a multichannel OTDR measurement instrument capable of evaluating multicore fibers has been developed.
Product Features
The MT9100A incorporates a unique mechanism that synchronizes the operation of four OTDR channels. Designed primarily for R&D and multicore fiber manufacturing applications, it offers three key features:
- Crosstalk Distribution Measurement Between Cores
Enables measurement and visualization of crosstalk as a spatial distribution along the fiber, identifying critical areas and optimizing installation conditions.
- Increased Efficiency with Single-End Measurement
Enables measurements from only one end of the fiber, eliminating the need for operators on both sides and reducing operating time and costs.
- Increased Productivity in Multicore Fibers
Enables simultaneous measurement of transmission loss, return loss, and crosstalk on up to four cores without reconnection, significantly accelerating inspection processes.
