Apparatus for measuring wavelength and optical power and optical signal-to-noise ratio in wavelength division multiplexing optical telecommunications

摘要

The invention spontaneous emission discrimination signal with a band-pass wavelength and the optical intensity and the optical signal-to-noise ratio of the WDM optical signal in the optical communication system of the wavelength-division-multiplexed with an optical variable filter (optical signal-to-noise ratio) It relates to an apparatus for measuring.; The present invention provides a wavelength division branching off a portion of the multiplexed optical signal branch means, and receives the spontaneous emission spontaneous emission light source for outputting light, the spontaneous emission light component by reflecting the set wavelength part spontaneous emission discrimination signal output return means for the branched wavelength-division-branch from the means of multiplexed optical signal and the spontaneous emission passes the light to determine the band which signal is output to the combined optical spectrum curve optical variable filter, the band pass optical spectrum curves which is output from an optical variable filter to an optical / electrical conversion means, and a signal processor for calculating a wavelength-to-noise ratio and the optical intensity and the optical signal of the wavelength-division-multiplexed optical signal from said electrical signal converted into an electric signal.