Patent ID: 8380087

Claim:
A device comprising: a plurality of fixed wavelength optical sources capable of generating a plurality of optical signals associated with a respective plurality of output wavelengths; a wave guide assembly connected to the plurality of fixed wavelength optical sources, an optical sensor, and an optical network, the wave guide assembly including a plurality of fixed wavelength optical filter elements that selectively pass optical signals associated with a respective plurality of input wavelengths; and a processor to: activate one of the plurality of fixed wavelength optical sources, the one of the plurality of fixed wavelength optical sources generating a first optical signal associated with a first wavelength, and activate one of the plurality of fixed wavelength filter elements, the one of the plurality of fixed wavelength filter elements selectively passing a second wavelength, the wave guide assembly being to: direct the first optical signal, generated by the one of the plurality of fixed wavelength optical sources, to the optical network, and direct, via the activated one of the plurality of fixed wavelength filter elements, a second optical signal to the optical sensor, the second optical signal being received from the optical network and being generated at a source external to the device, the second optical signal being associated with the second wavelength, and block one or more signals associated with one or more other wavelengths carried on the optical network, including the first wavelength, from the optical sensor.