Data associated with "Power stabilization of a terahertz-frequency quantum-cascade laser using a photonic-integrated modulator"

This dataset is associated with the manuscript "Power stabilization of a terahertz-frequency quantum-cascade laser using a photonic-integrated modulator". We demonstrate a technique to stabilize the emission from a ~3.5 THz quantum-cascade laser against long-term power drifts, using a recently developed Photonic Integrated Circuit (PIC) structure formed by coupling a racetrack resonator with a ridge waveguide. Successful locking over >600 s was achieved using a proportional–integral control loop. A technique for integrating the PIC with a precision micromachined rectangular metallic waveguide module has also been demonstrated.