4.6 Article

Diode-pumped, actively Q-switched Nd,La:CaNb2O6 self-Raman laser at 1,174 nm

Journal

FRONTIERS IN PHYSICS
Volume 10, Issue -, Pages -

Publisher

FRONTIERS MEDIA SA
DOI: 10.3389/fphy.2022.1012551

Keywords

self-Raman; solid-state laser; acousto-optic Q-switch; Nd; La:CaNb2O6 crystal; diode pumping

Funding

  1. National Natural Science Foundation of China
  2. Leading Class of High-Level Innovation Team of Wenzhou City
  3. [62075167]
  4. [62275200]
  5. [61875199]

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In this study, a diode end-pumped Nd,La:CaNb2O6 self-Raman laser with acousto-optic Q-switching was used to generate the first Stokes wave at 1,174 nm. It was found that doping La3+ ions could improve the laser output performance and suppress fluorescence quenching.
Diode end-pumped Nd,La:CaNb2O6 self-Raman laser with acousto-optic Q-switching was successfully demonstrated for the first Stokes wave generation at 1,174 nm. A 1.0 at.% Nd3+ and 1.0 at.% La3+-doped CaNb2O6 crystal in dimensions 3 x 3 x 14.3 mm(3) was used as the self-Raman laser crystal. Doping 1 at.% La3+ ions into this crystal could subdue the fluorescence quenching caused by cross-relaxation between Nd3+ ions and finally improve the laser output performance. Under the incident pump power of 9.9 W, the first Stokes wave at 1,174 nm with a maximum output power up to 928 mW was obtained, with the diode to Stokes conversion efficiency of about 9.4%. The results show that the Nd,La:CaNb2O6 is also a promising self-Raman crystal for efficient fundamental and Raman laser operation.

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