Resonant grating for wavelength and polarization selection in high-power lasers emitting in the 2-μm wavelength region
Resonant grating for wavelength and polarization selection in high-power lasers emitting in the 2-μm wavelength region
This paper presents the design, fabrication, and implementation of a single-layer resonant-reflection grating-waveguide structure (RR-GWS) optimized for laser operation in the 2 μm wavelength region. The RR-GWS was designed to function effectively across a broad spectral region ranging from 1.9μm to 2.1 μm. Reflectance measurements confirmed the structure's wideband performance within this spectral region, with 99% resonant reflectivity. Incorporating the RR-GWS into a Ho: YAG thin-disk laser system, as a cavity folding mirror, it demonstrated very good power-handling capability and efficacy in wavelength and polarization selection. The 2 μm laser system achieved a linearly polarized output power of 36 W, with an optical efficiency of 34.6%. Additionally, the laser demonstrated a spectral bandwidth of < 0.5 nm full width at half maximum, i.e., 12 times narrower than that obtained with an equivalent all-mirror reference cavity.
Bashir, Danish
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Mourkioti, Georgia
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Boubekraoui, Ayoub
403339c3-b89b-4ece-a33a-59ea6809c818
Tomilov, Sergei
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Redkin, Mykyta
6821e5bf-8f69-462e-9b8d-b4f2750560cf
Saraceno, Clara J.
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Graf, Thomas
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Mackenzie, Jacob
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Abdou Ahmed, Marwan
596cab98-166a-4805-aa3b-f278f6dc1350
March 2025
Bashir, Danish
534a36c9-f44e-432e-8f62-7fef91a6c0ed
Mourkioti, Georgia
fdbd699f-f21a-4e85-98bb-f961bd59b19f
Boubekraoui, Ayoub
403339c3-b89b-4ece-a33a-59ea6809c818
Tomilov, Sergei
a3eab595-f6a5-4374-b733-a12b7933fbc6
Redkin, Mykyta
6821e5bf-8f69-462e-9b8d-b4f2750560cf
Saraceno, Clara J.
620f2a7e-554e-4601-ad01-218cd73cce59
Graf, Thomas
a8f9f5c7-fae6-459b-a970-2b8a25f412cb
Mackenzie, Jacob
1d82c826-fdbf-425b-ac04-be43ccf12008
Abdou Ahmed, Marwan
596cab98-166a-4805-aa3b-f278f6dc1350
Bashir, Danish, Mourkioti, Georgia, Boubekraoui, Ayoub, Tomilov, Sergei, Redkin, Mykyta, Saraceno, Clara J., Graf, Thomas, Mackenzie, Jacob and Abdou Ahmed, Marwan
(2025)
Resonant grating for wavelength and polarization selection in high-power lasers emitting in the 2-μm wavelength region.
Applied Physics B, 131 (3), [55].
(doi:10.1007/s00340-025-08410-5).
Abstract
This paper presents the design, fabrication, and implementation of a single-layer resonant-reflection grating-waveguide structure (RR-GWS) optimized for laser operation in the 2 μm wavelength region. The RR-GWS was designed to function effectively across a broad spectral region ranging from 1.9μm to 2.1 μm. Reflectance measurements confirmed the structure's wideband performance within this spectral region, with 99% resonant reflectivity. Incorporating the RR-GWS into a Ho: YAG thin-disk laser system, as a cavity folding mirror, it demonstrated very good power-handling capability and efficacy in wavelength and polarization selection. The 2 μm laser system achieved a linearly polarized output power of 36 W, with an optical efficiency of 34.6%. Additionally, the laser demonstrated a spectral bandwidth of < 0.5 nm full width at half maximum, i.e., 12 times narrower than that obtained with an equivalent all-mirror reference cavity.
Text
s00340-025-08410-5
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Accepted/In Press date: 3 February 2025
e-pub ahead of print date: 24 February 2025
Published date: March 2025
Identifiers
Local EPrints ID: 500414
URI: http://eprints.soton.ac.uk/id/eprint/500414
ISSN: 0946-2171
PURE UUID: 75455faf-17c6-4599-81d8-003e62c6d2aa
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Date deposited: 29 Apr 2025 16:41
Last modified: 28 Aug 2025 01:40
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Contributors
Author:
Danish Bashir
Author:
Georgia Mourkioti
Author:
Ayoub Boubekraoui
Author:
Sergei Tomilov
Author:
Mykyta Redkin
Author:
Clara J. Saraceno
Author:
Thomas Graf
Author:
Jacob Mackenzie
Author:
Marwan Abdou Ahmed
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