Patent ID: 6766072
Filing Date: 2004-07-20
Classification: H01S

Abstract:
An optical device comprising:(a) a first active medium having a first input port and a first output port arranged to define a first propagation path for traversal of a first optical signal in a first forward direction between the first input port and the first output port; (b) a second active medium having a second input port and a second output port arranged to define a second propagation path for traversal of a second optical signal in a second forward direction between the second input port and second output port; and (c) a feedback path connecting the first and second active media so as to route at least a portion of the first and second optical signals from the first and second output ports to the second and first output ports as respective second and first optical control signals for travel along the second and first propagation paths in second and first reverse directions that are opposite to the second and first forward directions respectively.