High-power and narrow-linewidth nanosecond pulsed intracavity crystalline Raman laser operating at 1.7 µm.
Opt Express
; 32(12): 20852-20861, 2024 Jun 03.
Article
em En
| MEDLINE
| ID: mdl-38859455
ABSTRACT
We report on a high-power and narrow-linewidth nanosecond pulsed intracavity crystalline Raman laser at 1.7â
µm. Driven by an acousto-optically Q-switched 1314â
nm two-crystal NdYLF laser, the highly efficient cascaded YVO4 Raman laser at 1715nm was obtained within the well-designed L-shaped resonator. Thanks to the absence of spatial hole burning in the stimulated Raman scattering process, significant spectral purification of second-Stokes radiation was observed by incorporating a fused silica etalon in the high-Q fundamental cavity. Under the repetition rate of 4 kHz, the highest average output power for single longitudinal mode operation was up to 2.2 W with the aid of precision vibration isolation and precision temperature controlling, corresponding to the pulse duration of â¼2.8â
ns and the spectral linewidth of â¼330â
MHz. Further increasing the launched pump power, the second-Stokes laser tended toward be always multimode, and the maximum average output power amounted to 4.8 W with the peak power of â¼0.8â
MW and the spectral linewidth of â¼0.08â
nm. The second-Stokes emission was near diffraction limited with M2 < 1.4 across the whole pump power range.
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MEDLINE
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En
Ano de publicação:
2024
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Article