Robust and broadband UV laser utilizing Čerenkov phase matching on a hybrid photonic chip

Asger Brimnes Gardner; Kevin Bach Gravesen; Jacob Christian Loft; Peter Tønning; Eric J. Stanton; Emil Zanchetta Ulsig; Nicolas Volet

doi:10.1364/OE.553404

Robust and broadband UV laser utilizing Čerenkov phase matching on a hybrid photonic chip

Asger Brimnes Gardner^*, Kevin Bach Gravesen, Jacob Christian Loft, Peter Tønning, Eric J. Stanton, Emil Zanchetta Ulsig, Nicolas Volet

^*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

Abstract

We present a detailed characterization of a hybrid photonic platform for robust and broadly tunable ultraviolet (UV) laser generation using Čerenkov nonlinear frequency conversion (CNFC). By integrating silicon nitride waveguides with barium borate (BBO) cladding, the platform achieves UV emission across an unprecedented wavelength range of 204–319 nm. Compared to state-of-the-art UV photonic devices, our approach addresses longstanding challenges in spectral range, tunability, and integration. Theoretical modeling and experimental validation demonstrate remarkable fabrication tolerance, maintaining phase matching over a 1500 nm waveguide width variation. Angle-resolved far-field mapping reveals key trade-offs in waveguide design and emission profile. These findings offer a compact, scalable solution addressing critical needs in disinfection, quantum technologies, and free-space optical communication.

Originalsprog	Engelsk
Tidsskrift	Optics Express
Vol/bind	33
Nummer	9
Sider (fra-til)	19330-19341
Antal sider	12
ISSN	1094-4087
DOI	https://doi.org/10.1364/OE.553404
Status	Udgivet - 5 maj 2025

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title = "Robust and broadband UV laser utilizing {\v C}erenkov phase matching on a hybrid photonic chip",

abstract = "We present a detailed characterization of a hybrid photonic platform for robust and broadly tunable ultraviolet (UV) laser generation using {\v C}erenkov nonlinear frequency conversion (CNFC). By integrating silicon nitride waveguides with barium borate (BBO) cladding, the platform achieves UV emission across an unprecedented wavelength range of 204–319 nm. Compared to state-of-the-art UV photonic devices, our approach addresses longstanding challenges in spectral range, tunability, and integration. Theoretical modeling and experimental validation demonstrate remarkable fabrication tolerance, maintaining phase matching over a 1500 nm waveguide width variation. Angle-resolved far-field mapping reveals key trade-offs in waveguide design and emission profile. These findings offer a compact, scalable solution addressing critical needs in disinfection, quantum technologies, and free-space optical communication.",

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AU - Gardner, Asger Brimnes

AU - Gravesen, Kevin Bach

AU - Loft, Jacob Christian

AU - Tønning, Peter

AU - Stanton, Eric J.

AU - Ulsig, Emil Zanchetta

AU - Volet, Nicolas

PY - 2025/5/5

Y1 - 2025/5/5

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AB - We present a detailed characterization of a hybrid photonic platform for robust and broadly tunable ultraviolet (UV) laser generation using Čerenkov nonlinear frequency conversion (CNFC). By integrating silicon nitride waveguides with barium borate (BBO) cladding, the platform achieves UV emission across an unprecedented wavelength range of 204–319 nm. Compared to state-of-the-art UV photonic devices, our approach addresses longstanding challenges in spectral range, tunability, and integration. Theoretical modeling and experimental validation demonstrate remarkable fabrication tolerance, maintaining phase matching over a 1500 nm waveguide width variation. Angle-resolved far-field mapping reveals key trade-offs in waveguide design and emission profile. These findings offer a compact, scalable solution addressing critical needs in disinfection, quantum technologies, and free-space optical communication.

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Robust and broadband UV laser utilizing Čerenkov phase matching on a hybrid photonic chip

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