Engineering

Materials science

Silicon

Semiconductor

Wavelength

Electronic circuit

Diode

Photonics

Laser

Physics

Laser linewidth

Optics

Integrated circuit

Tunable laser

Hybrid silicon laser

Laser diode

Semiconductor laser theory

Optoelectronics

Photonic integrated circuit

Electrical engineering

Hybrid integrated semiconductor laser sources offering extremely narrow spectral linewidth as well as compatibility for embedding into integrated photonic circuits are of high importance for a wide range of applications. We present an overview on our recently developed hybrid-integrated diode lasers with feedback from low-loss silicon nitride (Si3N4 in SiO2) circuits, to provide sub-100-Hz-level intrinsic linewidths, up to 120 nm spectral coverage around 1.55 um wavelength, and an output power above 100 mW. We show dual-wavelength operation, dual-gain operation, laser frequency comb generation, and present work towards realizing a visible-light hybrid integrated diode laser.

Hybrid Integrated Semiconductor Lasers with Silicon Nitride Feedback Circuits