Integration of photonic crystal based tunable lasers, waveguides and Y-couplers

We present the integration of two tunable photonic crystal waveguide lasers with a photonic crystal based combiner. The devices were fabricated on a layer structure with active and passive sections. The lasers are formed in the active part and consist of two longitudinally coupled photonic crystal waveguide segments. Photonic crystals based waveguides and a combiner, both defined in the passive sections, are used to direct the light of the two sources into a single output waveguide. Tuning over a 30 nm range is demonstrated. The two sources can be operated independently, allowing the simultaneous transmission of two freely selectable wavelengths.