Tm-fiber Laser Resonantly Pumped by 1.7 μm Laser Diode

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F24%3A00377862" target="_blank" >RIV/68407700:21340/24:00377862 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1117/12.3000072" target="_blank" >https://doi.org/10.1117/12.3000072</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.3000072" target="_blank" >10.1117/12.3000072</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Tm-fiber Laser Resonantly Pumped by 1.7 μm Laser Diode

Popis výsledku v původním jazyce

Thulium-doped double-clad fiber (Nufern, LMA-TDF-25/250, 3m long) based laser was tested under resonant excitation. As a source of pumping radiation at 1.7 um a fiber-coupled laser diode was used (fiber diameter 400 um, maximum power 25 W). Fiber laser resonator consisted of dichroic (high reflectivity at 2 um, high transparency at 1.7 um) free-space plane mirror, placed between lenses used to collimate and to focus the pumping radiation, and Fresnell reflection of active fiber end which serves as an output coupler. Under CW pumping this Tm-laser generated laser radiation at wavelength 1972nm with power up to 4.5W for absorbed pumping power 11W. The laser efficiency in respect to absorbed pumping power was 63% in this simple configuration. The goal of our work is to attract attention to the possibility of pumping thulium fiber lasers resonantly using laser diodes that are already readily available today. Thanks to resonance pumping, compared to cross-relaxation pumping at 0.8 um, it can be achieved higher efficiency and lower heat generation, which can help to reach high mean powers from thulium fiber lasers. An important fact is that both the generated laser radiation and pumping radiation belong to the eye-safe spectral region, which reduces the risk of vision damage.

Název v anglickém jazyce

Tm-fiber Laser Resonantly Pumped by 1.7 μm Laser Diode

Popis výsledku anglicky

Thulium-doped double-clad fiber (Nufern, LMA-TDF-25/250, 3m long) based laser was tested under resonant excitation. As a source of pumping radiation at 1.7 um a fiber-coupled laser diode was used (fiber diameter 400 um, maximum power 25 W). Fiber laser resonator consisted of dichroic (high reflectivity at 2 um, high transparency at 1.7 um) free-space plane mirror, placed between lenses used to collimate and to focus the pumping radiation, and Fresnell reflection of active fiber end which serves as an output coupler. Under CW pumping this Tm-laser generated laser radiation at wavelength 1972nm with power up to 4.5W for absorbed pumping power 11W. The laser efficiency in respect to absorbed pumping power was 63% in this simple configuration. The goal of our work is to attract attention to the possibility of pumping thulium fiber lasers resonantly using laser diodes that are already readily available today. Thanks to resonance pumping, compared to cross-relaxation pumping at 0.8 um, it can be achieved higher efficiency and lower heat generation, which can help to reach high mean powers from thulium fiber lasers. An important fact is that both the generated laser radiation and pumping radiation belong to the eye-safe spectral region, which reduces the risk of vision damage.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proc. SPIE 12865, Fiber Lasers XXI: Technology and Systems

ISBN

978-1-5106-6989-5

ISSN

0277-786X

e-ISSN

1996-756X

Počet stran výsledku

5

Strana od-do

—

Název nakladatele

SPIE

Místo vydání

Bellingham (stát Washington)

Místo konání akce

San Francisco, CA

Datum konání akce

27. 1. 2024

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

001211791400045