Agile and fast switching monolithically integrated four wavelength selectable source at 1.55 μm

We demonstrate 4-nm spaced four emitted wavelengths on a single output waveguide in a four channel DBR lasers array monolithically integrated with a 4 > 1 coupler, Using distributed Bragg reflector tunability, all wavelengths within a 16nm range can be reached with an accuracy better than 0.2 mn, Wavelength switching time measured at 90% of nominal power is 4 ns.