A hybrid-integrated diode laser in the visible spectral range

TL;DR

This paper demonstrates the first hybrid-integrated diode laser in the visible spectrum, achieving wide tunability, high coherence, and significant power output using a novel AlGaInP and Si3N4 integrated design.

Contribution

It introduces a new hybrid-integrated diode laser in the visible range with high coherence and tunability, combining AlGaInP and Si3N4 technologies.

Findings

Spectral coverage of 10.8 nm around 684.4 nm

Output power of up to 4.8 mW

Intrinsic linewidth of 2.3±0.2 kHz

Abstract

Generating visible light with wide tunability and high coherence based on photonic integrated circuits is of high interest for applications in biophotonics, precision metrology and quantum technology. Here we present the first demonstration of a hybrid-integrated diode laser in the visible spectral range. Using an AlGaInP optical amplifier coupled to a low-loss Si3N4 feedback circuit based on microring resonators, we obtain a spectral coverage of 10.8 nm around 684.4 nm wavelength with up to 4.8 mW output power. The measured intrinsic linewidth is 2.3$\pm$0.2 kHz.