Main signal controlling apparatus and method in a WDM...

Management of optical links using power level information

Measurement of optical power in optical fiber networks

Measurement of polarization dependent loss in an optical...

Measurement of polarization dependent loss in an optical...

Mechanism for tracking wavelengths in a DWDM network without...

Method and a system for monitoring the transmission of...

Method and an apparatus for preventing traffic interruptions...

Method and an improved device for controlling the power...

Method and apparatus for assessing performance of optical...

Method and apparatus for automatically controlling optical...

Method and apparatus for locating faults in an optical network

Method and apparatus for managing an optical signal

Method and apparatus for managing lightpaths in...

Method and apparatus for measuring and estimating optical...

Method and apparatus for measuring optical power of very...

Method and apparatus for measuring optical signal-to-noise...

Method and apparatus for monitoring an optical WDM network

Method and apparatus for monitoring WDM optical signal

Method and apparatus for multi-protocol and multi-rate...