Broadly tunable diode-pumped 2.1µm laser based on µ-PD grown Tm,Ho:GSAG

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00643883" target="_blank" >RIV/68378271:_____/25:00643883 - isvavai.cz</a>

Result on the web

<a href="https://www.spiedigitallibrary.org/conference-proceedings-of-spie/13698/3072913/Broadly-tunable-diode-pumped-21%c2%b5m-laser-based-on-%c2%b5-PD/10.1117/12.3072913.short" target="_blank" >https://www.spiedigitallibrary.org/conference-proceedings-of-spie/13698/3072913/Broadly-tunable-diode-pumped-21%c2%b5m-laser-based-on-%c2%b5-PD/10.1117/12.3072913.short</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.3072913" target="_blank" >10.1117/12.3072913</a>

Result language

angličtina

Original language name

Broadly tunable diode-pumped 2.1µm laser based on µ-PD grown Tm,Ho:GSAG

Original language description

Miniature diode-pumped solid-state lasers operating in the 2.1µm atmospheric window are crucial for spectroscopic applications and free-space optical communication. We report on the spectroscopic and laser properties of a new Tm,Ho-codoped gadolinium-scandium-aluminium garnet (Tm,Ho:GSAG), a promising alternative to conventional hosts like YLF, YAG, and YAP. The mixed-garnet structure enables broad absorption and emission while maintaining the favorable thermo-mechanical properties of oxides. A Tm,Ho:GSAG crystal was grown by the µ-PD method, yielding a 3mm diameter, 20mm long rod. This technique enables the rapid and cost-effective preparation of small yet sufficiently high-quality laser-grade samples, facilitating extensive testing of different material compositions. A 3mm long sample with polished facets was prepared for laser testing. Spectroscopic characterization included absorption and emission spectra as well as fluorescence decay time measurements at 2.1µm. Laser experiments were conducted with a 782nm pulsed diode pump. In an untuned resonator, the laser achieved a slope efficiency of 25% with respect to absorbed pump power, with a peak emission at 2094nm. Wavelength tuning was implemented using an MgF2 birefringent filter, covering a range from 2025nm to 2134nm, with maximum output power at 2122nm. These results demonstrate that Tm,Ho:GSAG is a promising gain medium for tunable diode-pumped mid-IR laser sources.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

10306 - Optics (including laser optics and quantum optics)

Project

<a href="/en/project/EH23_020%2F0008525" target="_blank" >EH23_020/0008525: Innovative laser and scintillation materials for modern applications</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Photonics, Devices, and Systems IX

ISBN

9781510693456

ISSN

0277-786X

e-ISSN

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Number of pages

7

Pages from-to

136980L

Publisher name

SPIE

Place of publication

Bellingham

Event location

Prague

Event date

Jun 9, 2025

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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