An optical multiplexing device includes an optical element having at least one set of diffractive elements, and an optical reflector. The reflector routes, between first and second optical ports, that portion of an optical signal transmitted by the diffractive element set. The diffractive element set...http://www.google.ca/patents/USRE43226?utm_source=gb-gplus-sharePatent USRE43226 - Optical multiplexing device
