All-solid-state CW Nd:KGd(WO4)2 self-Raman laser at 561 nm by intracavity sum-frequency mixing of fundamental and first-Stokes wavelengths

Abstract

We report for the first time an efficient continuous wave (CW) laser emission at 561 nm by sum-frequency mixing of the fundamental and first-Stokes fields generated within an Nd:KGd(WO4)2 self-Raman laser. Intracavity sum-frequency mixing with LiB3O5 (LBO) nonlinear crystal yielded 570 mW of visible yellow-green emission; the output power stability over 4 h is better than 4.6%. The laser beam quality M2 factors are 1.54 and 2.13 in both horizontal and vertical dimensions respectively.

Thermal lensing study and athermal directions in flashlamp-pumped Nd:KGd(WO4)2 laser crystal

“…yellow light at 0.56 or 0.59 µm [11,12]). Recently it was also found to be the appropriate material for buried channel waveguides preparation [13,14].…”

CVD-diamond external cavity nanosecond Raman laser operating at 1.63 µm pumped by 1.34 µm Nd:YAP laser

“…Many materials as BaWO 4 , KGW, Ba(NO 3 ) 2 , NaNO 3 , and others were tested in pulsed or continuous-wave regimes [1][2][3][4][5][6][7][8]. Self-Raman laser operation using neodymium-doped materials as Nd:GdVO 4 , Nd:KGd(WO 4 ) 2 , and Nd:LuVO 4 has been also demonstrated [9][10][11]. Among the Raman solidstate materials, the diamond has outstanding properties.…”

Compact Q-switched and mode-locked Nd3+:YVO4/Cr4+:YAG self-Raman laser

“…These systems are simple and versatile, and by choosing different laser and Raman crystals, a range of output wavelengths can be obtained for potential applications in the areas of medicine, biomedicine, and remote sensing. Systems which are particularly useful are self-Raman compact lasers based on Nd-doped laser crystals that provide the first Stokes line in the near infrared region between 1100 and 1200 nm [1][2][3][4][5][6][7]. Combined with frequency doubling, these laser sources generate radiation at wavelengths in the yellow-orange spectral region.…”