Compact efficient high-power continuous-wave Nd:YVO4/KGW/LBO Raman lasers for selectable wavelengths within 559-603â
nm.
Opt Express
; 32(8): 14133-14142, 2024 Apr 08.
Article
em En
| MEDLINE
| ID: mdl-38859367
ABSTRACT
Compact efficient high-power continuous-wave NdYVO4 Raman lasers for selectable wavelengths within 559-603â
nm are achieved by using KGW crystal for intracavity stimulated Raman scattering (SRS) and lithium triborate (LBO) crystal for intracavity sum frequency generation (SFG) and second harmonic generation (SHG). The LBO crystal with the cut angle in the XY plane for the type-I phase matching is used to perform intracavity SHG or SFG. Experimental results reveal that the participated Stokes lines include the internal vibration mode at 901â
cm-1, the external vibrational mode at 209â
cm-1, and the combination mode of the 901â
cm-1 and 209â
cm-1 Raman shifts. By tuning LBO temperature for attaining the maximum output power, the output spectrum reveals the triple peaks of 588.7, 595.7, and 603.1â
nm with the intensity ratio of 1041. Under this circumstance, the output power can reach the highest value of 10.8 W at a pump power of 40 W. Furthermore, the output spectrum can be simply concentrated on the single peaks among 588.7 (orange), 565.7 (yellow), and 559.1â
nm (lime) by tuning LBO temperature to fulfill the selection of the critical phase matching. The output powers at a pump power of 40 W can be up to 8.0, 6.1, and 9.8 W for the single-peak emission at 588.7, 565.7, and 559.1â
nm, respectively. Finally, a dual-peak emission of 565.7 and 572.3â
nm with total output power of 5.2 W can be generated by tuning LBO temperature to match the SFG for 572.3â
nm.
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MEDLINE
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article