Tunable Hybrid-Integrated Diode Laser at 637 nm

Photonic quantum technologies, such as quantum-key distribution and photonic quantum processing, are currently undergoing a transition from research labs to industrial applications [1]. Upscaling of such systems calls for on-chip laser sources. In particular, many applications require lasers in the visible range, e.g., for addressing particular atomic and ionic transitions, quantum dots or nitrogen vacancy (NV) centers. Specifically, narrow linewidths and wide tunabilty are required for addressing quantum emitters. Scaling and industrial applications also demand mode stability and robustness, such as for portability.