Tm-fiber Laser Resonantly Pumped by 1.7 μm Laser Diode

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
Tm-fiber Laser Resonantly Pumped by 1.7 μm Laser Diode
Original language description
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.
Czech name
—
Czech description
—

Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Proc. SPIE 12865, Fiber Lasers XXI: Technology and Systems
ISBN
978-1-5106-6989-5
ISSN
0277-786X
e-ISSN
1996-756X
Number of pages
5
Pages from-to
—
Publisher name
SPIE
Place of publication
Bellingham (stát Washington)
Event location
San Francisco, CA
Event date
Jan 27, 2024
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
001211791400045

Similar results(10)