Patent ID: 6744495
Filing Date: 2004-06-01
Classification: H04J

Abstract:
A WDM (wavelength division multiplexer) measurement system comprising:a tunable laser for providing light to a WDM; a polarization controller connecting to the tunable laser for controlling a polarization state of the light coming from the tunable laser; a power meter module for detecting light energy coming from the WDM; an RL (Return Loss) module for use in measuring return loss of the WDM; and a computation and control device connecting with the tunable laser, the RL module, the power meter module and the polarization controller, the device having a control software for controlling the WDM measurement process; wherein when an input port of the WDM connects with the polarization controller, IL (Insertion Loss) and PDL (Polarization Dependent Loss) of the WDM are measured, and when the input port of the WDM connects with the RL module, RL and DIR (Directivity) of the WDM are measured.