A wavelength division multiplexing device is disclosed. In one embodiment, the wavelength division multiplexing device comprises a crystalline collimating lens for collimating a plurality of monochromatic optical beams, a diffraction grating for combining the plurality of collimated, monochromatic optical...http://www.google.es/patents/US6289155?utm_source=gb-gplus-sharePatente US6289155 - Wavelength division multiplexing/demultiplexing devices using dual high index of refraction crystalline lenses
Wavelength division multiplexing/demultiplexing devices using dual high ...
