@techreport{65764f91a5164c3b986f37b7d9d20f8e,
title = "Ring resonator enhanced mode-hop-free wavelength tuning of an integrated extended-cavity laser",
abstract = "Extending the cavity length of diode lasers with feedback from Bragg structures and ring resonators is highly effective for obtaining ultra-narrow laser linewidths. However, cavity length extension also decreases the free-spectral range of the cavity. This reduces the wavelength range of continuous laser tuning that can be achieved with a given phase shift of an intracavity phase tuning element. We present a method that increases the range of continuous tuning to that of a short equivalent laser cavity, while maintaining the ultra-narrow linewidth of a long cavity. Using a single-frequency hybrid integrated InP-Si3N4 diode laser with 120 nm coverage around 1540 nm, with a maximum output of 24 mW and lowest intrinsic linewidth of 2.2 kHz, we demonstrate a six-fold increased continuous and mode-hop-free tuning range of 0.22 nm (28 GHz) as compared to the free-spectral range of the laser cavity.",
author = "{van Rees}, Albert and Youwen Fan and Dimitri Geskus and Klein, {Edwin J.} and Oldenbeuving, {Ruud M.} and {van der Slot}, {Peter J.M.} and Klaus-J. Boller",
year = "2019",
month = dec,
day = "19",
language = "English",
publisher = "ArXiv.org",
number = "arXiv:1912.09455v1",
type = "WorkingPaper",
institution = "ArXiv.org",
}