Method and apparatus for signal and switch monitoring in an optical cross connect
AssigneeAT&T Corp.
InventorsEvan Lee Goldstein, Lih-Yuan Lin, Leda Maria Lunardi
Life of this patent
Estimating the term…
Loading patent…
AssigneeAT&T Corp.
InventorsEvan Lee Goldstein, Lih-Yuan Lin, Leda Maria Lunardi
Estimating the term…
The present invention provides a variety of methods and apparatus for monitoring signal quality and switch operation for optical switches in an optical cross connect. The signal quality can be checked by using a beamsplitter to reflect a portion of the light beam carrying the signal onto a photodetector which is connected to a device which can monitor loss of signal, loss of frame, and other transmission characteristics. The position of a switch or waveguide can be monitored by circuits which detect variable levels of resistance and capacitance based on the switch's position or by reflecting probe light beams off the back of the switching mirror. The present invention also provides a method for determining if the signal quality photodetector is functioning correctly.
An apparatus for determining the position of an optical switch mirror, comprising:
An apparatus for determining the position of an optical switch mirror, comprising:
An apparatus for measuring the position of an optical switch mirror, comprising:
Dependencies are inferred from the claim text.