OPTICAL DEVICES AND METHODS

摘要

An optical device (1) for dividing input light having a mix of wavelengths (.lambda.1 to .lambda.16) into discrete output wavelength bands (.lambda.1 to .lambda.16) and combining discrete wavelength bands (.lambda.1 to .lambda.16) into an output of mixed wavelengths (.lambda.1 to .lambda.16). The device (1) includes at least three optical wavelength selective devices (2, 3, 10) of the kind having a first port (23), a second port (25) and a third port (26) optically interconnected at least partly by one or more waveguides (18, 19). A first of the selective devices (2) has the second port (25) optically connected by waveguide to the first port (23) of a second of the devices (3) and the third port (26) optically connected by waveguide to the first port (23) of a third of the devices (10).