Simultaneous modulation and wavelength multiplexing with a tunable Ti:LiNbO3 directional coupler filter

We report a broadly tunable (85 A/V) wavelength-selective Ti: LiNbO3-waveguide directional coupler, with which we demonstrate λ=1.3 μm/λ = 1.55 μm multiplexing while simultaneously modulating the long-wavelength channel.