Patent ID: 7492992

Claim:
A bi-directional planar light circuit transceiver device for separating optical signals at first and second wavelengths from one another from a single input signal source, the first wavelength different from the second wavelength, comprising a planar light circuit comprising an internal waveguide structure adapted to direct optical signals from a single input signal source in the planar light circuit; a wavelength selective filter configured to pass a band of signals centered at said first wavelength and to reflect a band of signals centered at said second wavelength, the bands of signals centered at the first and second wavelengths comprised in the single input signal source, the wavelength selective filter positioned external to the planar light circuit and placed in energy coupled proximity to an external surface of the planar light circuit; and a first signal detector and a second signal detector positioned such that the first signal detector detects the band of signals centered at said first wavelength and the second signal detector detects the band of signals centered at said second wavelength.