High average power and high repetition rate eye-safe Raman laser driven by a two-crystal Nd:YVO4 laser.
Opt Lett
; 49(15): 4270-4273, 2024 Aug 01.
Article
em En
| MEDLINE
| ID: mdl-39090911
ABSTRACT
We report on a high average power and high repetition rate nanosecond pulsed eye-safe KGW Raman laser intracavity driven by an acousto-optic Q-switched 1342â
nm two-crystal NdYVO4 laser. Taking advantages of the carefully selected two-composite-laser-crystal configuration, the thoroughly optimized gate-open time of acousto-optic modulator and the ingeniously designed U-shaped resonator, substantial power and efficiency enhancements as well as superior mode matching have been enabled. Under the injected pump power of 64.5â
W, the average output powers of the first-Stokes fields at 1496 and 1527â
nm can be up to 8.1 and 9.5â
W with 25â
kHz repetition rate and 3.2â
µs gate-open time, respectively, corresponding to the optical power conversion efficiencies of 12.6% and 14.7%. Meantime, the resultant pulse widths are determined to be 4.6 and 6.3â
ns with the peak powers of approximately 70 and 60â
kW, respectively. The beam quality can be maintained with M2 < 1.5 across the entire output power range.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Opt Lett
/
Opt. lett. (Online)
/
Optics letters (Online)
Ano de publicação:
2024
Tipo de documento:
Article