Widely tunable photonic crystal coupled cavity laser diodes based on quantum-dash active material

Widely tunable monomode laser diodes emitting in the 1.9 mum wavelength range have been realized on InP based InAs/InGaAs quantum dash-in-a-well active material. 2D photonic crystal structures are used to define coupled cavity devices with two sections yielding a tuning range of 36 nm. Water vapor absorption measurements are demonstrated at wavelengths more than 34 nm apart using one such photonic crystal coupled cavity laser diode.