Sub-kHz linewidth intracavity VECSEL-pumped OPO

Tools

Anderson, Steven and Moriya, Paulo Hisao and Caspani, Lucia and Hastie, Jennifer E. (2026) Sub-kHz linewidth intracavity VECSEL-pumped OPO. APL Photonics, 11 (2). 026112. ISSN 2378-0967 (https://doi.org/10.1063/5.0308873)

[thumbnail of Anderson-etal-APLP-2026-Sub-kHz-linewidth-intracavity-VECSEL-pumped-OPO]
Preview
 Text. Filename: Anderson-etal-APLP-2026-Sub-kHz-linewidth-intracavity-VECSEL-pumped-OPO.pdf
Final Published Version
License: Creative Commons Attribution 4.0 logo
Download (6MB)| Preview

Abstract

We report low noise and narrow linewidth performance of an actively stabilized optical parametric oscillator, intracavity-pumped by a visible AlGaInP-based vertical-external-cavity surface-emitting laser (VECSEL). Under dual-locking conditions, where the VECSEL and intracavity resonant idler are stabilized using the Pound–Drever–Hall and side-of-fringe locking techniques, respectively, narrow linewidths of 6.21(1) kHz (VECSEL) and 151(1) Hz (idler) are achieved for integration times as long as 4 s, illustrating the transfer of noise from the VECSEL fundamental to the OPO non-resonant signal. In this regime, the relative intensity noise of all three interacting waves is <−120 dBc/Hz for all frequencies above 1 kHz, indicating that this coherent laser system is well-suited for quantum optics experiments, potentially those involving squeezed light generation.

ORCID iDs

Anderson, Steven ORCID logoORCID: https://orcid.org/0009-0006-0158-4265, Moriya, Paulo Hisao ORCID logoORCID: https://orcid.org/0000-0002-6761-191X, Caspani, Lucia ORCID logoORCID: https://orcid.org/0000-0003-2711-0448 and Hastie, Jennifer E. ORCID logoORCID: https://orcid.org/0000-0002-4066-7411;
CORE (COnnecting REpositories)