OSA with rectangular shape resolution filters video

The APEX Technologies Optical Spectrum Analyzers clearly show much more details than the grating based OSA and leaves any kind of guess work behind.

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Apllication Notes

 

Perfect resolution filters for OSNR measurement !

Grating Based and Interferometric Based Optical Spectrum Analyzer Resolution Filter Shape Comparison

Several resolution filters between 250 GHz and 5 MHz are available.  APEX Technologies rectangular shape resolution filters allow a nearly perfect integration of the signal over the selected resolution, while a grating based Optical Spectrum Analyzer filter integrate inside a wide base triangular shape.
This sharp integration allows our OSA to perform a much more realistic level measurement, essential for an accurate OSNR measurement.

Optical spectrum analyzers with rectangular shape resolution filters between 250 GHz and 5 MHz