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Wavelength division multiplex (wdm) signal monitor

  • US 20030138250A1
  • Filed: 09/26/2002
  • Published: 07/24/2003
  • Est. Priority Date: 04/06/2000
  • Status: Abandoned Application
First Claim
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1. A WDM signal monitor (4) for measuring optical power of components of a WDM signal comprising:

  • a wavelength selectable light source (20) which is operable to produce an optical output at a known selectable wavelength;

    an optical receiver (24) to which said optical output and WDM signal are applied and which is operable to produce an electrical signal whose frequency is representative of the difference in wavelength between a component of the WDM signal and optical output and;

    means (22) for determining the power of the component of the WDM signal from the magnitude of said electrical signal.

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