Optical spectrum analyser

Paul Boughton

EXFO Inc has added the first coherent Pol-Mux 40G/100G optical signal-to-noise ratio (OSNR) testing capabilities, called WDM-Aware Pol-Mux, to its FTB/IQS‑5240S-P and FTB/IQS-5240BP Optical Spectrum Analyzers (OSAs).

With more and more operators deploying 40G or 100G coherent systems on metro and long‑haul dense wavelength-division multiplexing (DWDM) networks to meet the ever-increasing demand for bandwidth, Pol-Mux OSNR and the use of a Pol-Mux OSA have become essential requirements for commissioning and troubleshooting networks.

That’s because recent 40G/100G coherent systems featuring polarisation multiplexing have made it impossible to carry out OSNR measurements with traditional methods like the IEC method (out-of-band) or in-band methods.

Key product features include:

* An OSNR measurement of coherent channels based on ASE noise;

* Automation of OSNR measurements based on the channel turn off method, saving time and reducing risk of human errors;

* Availability on our FTB-200 and FTB-500 platforms for easy portability.

These new Pol-Mux capabilities are available as a software option that can be added to EXFO’s existing in-band OSAs (FTB/IQS-5240S-P and FTB/IQS-5240BP) to easily transform them into Pol-Mux OSAs.
For more information, visit www.exfo.com