We describe a variable bandwidth tunable optical spectral filtering device and associated method for selectively directing a portion of a wavelength multiplexed input signal, entering through one or more optical fibers, into one or more output signals provided to one or more optical fibers and/or electronic...http://www.google.de/patents/US20050074204?utm_source=gb-gplus-sharePatent US20050074204 - Spectral plane method and apparatus for wavelength-selective optical switching
