Watt-level output power and near-diffraction-limit beam quality mid-infrared Ho:GdVO4 self-Raman laser at 2.5â
µm.
Opt Express
; 32(6): 10479-10489, 2024 Mar 11.
Article
em En
| MEDLINE
| ID: mdl-38571258
ABSTRACT
We demonstrate an efficient active Q-switched HoGdVO4 self-Raman laser at 2500â
nm for the first time, to our knowledge. Using HoGdVO4 crystal as the gain medium for both the 2048nm fundamental laser and the 2500â
nm Raman laser, the output performances of a new mid-infrared self-Raman laser were investigated. The maximum average output power of 1.45 W was achieved at an incident pump power of 22.5 W, with a slope efficiency of 25.8%, for an output transmittance of 30% and a pulse repetition frequency of 15 kHz. The maximum single pulse energy of 96.7 µJ with a pulse width of 11.35â
ns was obtained, corresponding to the peak power of 8.5â
kW. The beam quality was near diffraction limited with the M2 factors of 1.15 and 1.06 along the x and y directions. Moreover, adopting the two-end output way of the fundamental laser and the Raman laser, the Raman gain coefficient of HoGdVO4 crystal was estimated to be 1.14â
cm/GW at 2048nm. This work shows that HoGdVO4 is an excellent self-Raman laser crystal for the generation of high power Raman laser at 2.5 µm.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Opt Express
Assunto da revista:
OFTALMOLOGIA
Ano de publicação:
2024
Tipo de documento:
Article
País de publicação:
Estados Unidos