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 for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › 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.

Original language	English
Journal	Optics Express
Volume	33
Issue	9
Pages (from-to)	19330-19341
Number of pages	12
ISSN	1094-4087
DOIs	https://doi.org/10.1364/OE.553404
Publication status	Published - 5 May 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.",

author = "Gardner, {Asger Brimnes} and Gravesen, {Kevin Bach} and Loft, {Jacob Christian} and Peter T{\o}nning and Stanton, {Eric J.} and Ulsig, {Emil Zanchetta} and Nicolas Volet",

note = "Publisher Copyright: {\textcopyright} 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.",

year = "2025",

month = may,

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doi = "10.1364/OE.553404",

language = "English",

volume = "33",

pages = "19330--19341",

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Robust and broadband UV laser utilizing Čerenkov phase matching on a hybrid photonic chip. / Gardner, Asger Brimnes; Gravesen, Kevin Bach; Loft, Jacob Christian et al.
In: Optics Express, Vol. 33, No. 9, 05.05.2025, p. 19330-19341.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

TY - JOUR

T1 - Robust and broadband UV laser utilizing Čerenkov phase matching on a hybrid photonic chip

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

N2 - 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.

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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U2 - 10.1364/OE.553404

DO - 10.1364/OE.553404

M3 - Journal article

AN - SCOPUS:105004058998

SN - 1094-4087

VL - 33

SP - 19330

EP - 19341

JO - Optics Express

JF - Optics Express

IS - 9

ER -

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

Abstract

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