Patent ID: 7474824

Claim:
A planar lightwave circuit device comprising: a slab waveguide including a core region; a first port for launching a first input optical signal into the slab waveguide; a second port optically coupled with the first port for outputting at least a first portion of the input optical signal from the slab waveguide; a third port optically coupled to the first port; a first planar filter formed in the slab waveguide for redirecting the first portion of the input optical signal to the second port; and a concave reflective element having optical power formed in an end wall of the slab waveguide optically coupling the first port to the third port and enabling light to be focused therebetween wherein the first filter comprises a concave distributed Bragg reflector for redirecting and refocusing the first portion of the first input optical signal to the second port; and wherein the reflective element comprises a concave diffraction grating formed in the end wall of the slab waveguide for filtering and refocusing at least one wavelength channel between the first and third ports.