We present the first hybrid integrated extended cavity diode laser (ECDL) tunable around 637 nm. This wavelength range is important for excitation of nitrogen vacancy centers (NV) in diamond, one of the leading platforms for quantum information processing. The laser comprises a custom designed Si3N4 circuit using high-confinement, low-loss, double-stripe waveguides to provide frequency selective feedback to a semiconductor optical amplifier (SOA). The SOA, a tilted-waveguide GaAs double-pass amplifier, and the Si3N4 feedback circuit are hybrid integrated using tapers for mode matching. Two microring resonators in the feedback circuit serve for single-wavelength operation and wide tuning. The laser shows a threshold pump current of 50 mA with 0.26 mW fiber-coupled output power. The laser can be tuned across the full gain bandwidth of 6 nm, including the NV-center target wavelength.
|Number of pages||4|
|Publication status||Published - 25 Nov 2022|
|Event||26th annual Symposium of the IEEE Photonics Benelux Chapter 2022 - Eindhoven University of Technology, Eindhoven, Netherlands|
Duration: 24 Nov 2022 → 25 Nov 2022
Conference number: 26
|Conference||26th annual Symposium of the IEEE Photonics Benelux Chapter 2022|
|Period||24/11/22 → 25/11/22|