Patent ID: 6901182

Claim:
A retro-reflective type optical signal processing device comprising: a micro-electro-mechanical (MEM) reflective unit having a first reflective mirror plane and a second reflective mirror plane formed on a silicon substrate, incoming optical signals from an input port incident to the first reflective mirror plane being reflected forward to the second reflective mirror plane, thereby reflected optical signals incident to the second reflective mirror plane being reflected again, second reflected optical signals being transmitted froward to an output port, such that the transmission directions of input and output optical signals are opposite and parallel to each other; a set of movable shutters formed on said silicon substrate are allocated at light transmission routes of the input port to the MEM reflective unit, and from the MEM reflective unit to the output port, wherein the optical signal intensity is controllable by changing a position of the set of movable shutters to a position selected from the group consisting of totally blocking, totally reflecting, partially blocking and partially reflecting an optical light beam; wherein the units of optical signal input ports and optical signal output ports being chosen from the group consisting of fibers and waveguides, wherein the set of movable shutters is connected to a set of microactuators formed on said silicon substrate and moved by this set of microactuators, this set of microactuators capable of holding said shutter at appropriate position along with the light transmission routes according to the relative optical requirement.