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A fast on-line OSNR measurement technique which uses the downhill simplex algorithm as a minimum finder is proposed and tested in CW signals for different OSNR levels with excellent agreement. The method is shown to be stable after 8 h of uninterrupted operation and is not affected by environmental temperature change during the test.
Inspec keywords: optical fibre networks; optical fibre polarisation; wavelength division multiplexing
Other keywords:
Subjects: Other fibre optical properties; Fibre optics; Optical fibre networks; Optical communication devices, equipment and systems; Multiplexing and switching in optical communication