@article{d1d43aad859e46b8b18eb5c7204a1831,
title = "High spectral purity microwave generation using a dual-frequency hybrid integrated semiconductor-dielectric waveguide laser",
abstract = "We present an integrated semiconductor-dielectric hybrid dual-frequency laser operating in the 1.5 μm wavelength range for microwave and terahertz (THz) generation. Generating a microwave beat frequency near 11 GHz, we observe an intrinsic linewidth as low as about 2 kHz. This is realized by hybrid integration of a single diode amplifier based on indium phosphide (InP) with a long, low-loss silicon nitride (Si3N4) feedback circuit to extend the cavity photon lifetime, resulting in a cavity optical roundtrip length of about 30 cm on a chip. Simultaneous lasing at two frequencies is enabled by introducing an external control parameter for balancing the feedback from two tunable, frequency-selective Vernier mirrors on the Si3N4 chip. Each frequency can be tuned with a wavelength coverage of about 80 nm, potentially allowing for the generation of a broad range of frequencies in the microwave range up to the THz range.",
author = "Jesse Mak and {van Rees}, Albert and Lammerink, {Rob E. M.} and Dimitri Geskus and Youwen Fan and {van der Slot}, {Peter J. M.} and Roeloffzen, {Chris G. H.} and Klaus-J Boller",
note = "Publisher Copyright: {\textcopyright} 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.",
year = "2021",
month = aug,
day = "15",
doi = "10.1364/OSAC.424586",
language = "English",
volume = "4",
pages = "2133--2142",
journal = "OSA Continuum",
issn = "2578-7519",
publisher = "Optical Society of America",
number = "8",
}