Broadly Tunable Diode-Pumped 2.1 µm Laser Based on µ-PD Grown Tm,Ho:GSAG Crystal

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F25%3A00385979" target="_blank" >RIV/68407700:21340/25:00385979 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1117/12.3072913" target="_blank" >https://doi.org/10.1117/12.3072913</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 2.1 µm Laser Based on µ-PD Grown Tm,Ho:GSAG Crystal

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

—

Czech description

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Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20201 - Electrical and electronic engineering

Project

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

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2025

Confidentiality

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

Article name in the collection

Proc. SPIE 13698, Photonics, Devices, and Systems IX

ISBN

978-1-5106-9345-6

ISSN

0277-786X

e-ISSN

1996-756X

Number of pages

7

Pages from-to

—

Publisher name

The International Society for Optical Engineering (SPIE)

Place of publication

Bellingham WA

Event location

Prague

Event date

Jun 9, 2025

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

001723559900021