Nd:YLF/KGW intracavity Raman laser in DBMC configuration emitting at 1147 and 1163 nm in TEM00

Merilyn S. Ferreira; Helen M. Pask; Niklaus U. Wetter

doi:10.1117/12.2545092

21 February 2020 Nd:YLF/KGW intracavity Raman laser in DBMC configuration emitting at 1147 and 1163 nm in TEM₀₀

Merilyn S. Ferreira, Helen M. Pask, Niklaus U. Wetter

Proceedings Volume 11259, Solid State Lasers XXIX: Technology and Devices; 112590K (2020) https://doi.org/10.1117/12.2545092
Event: SPIE LASE, 2020, San Francisco, California, United States

Abstract

An Nd:YLF/KGW intracavity Raman laser in DBMC (double-beam-mode-controlling) configuration has been investigated in this work. The fundamental wavelength laser was generated using a Nd:YLF crystal pumped in DBMC configuration generating an emission wavelength of 1053 nm in σ-polarization. A VBG (volume-Bragg-grating) equipped diode emitting at 797 nm was used as pump source. The KGW crystal has two strong Raman lines, 768 cm^-1 and 901 cm^-1, generating two Raman wavelengths at 1147 nm and 1163 nm, respectively. The DBMC technique allows to produce TEM₀₀ stable output in a side-pumped configuration with no requirement to introduce any additional mode selection technique, thus achieving high efficiency for fundamental TEM₀₀ operation. The high power density of the fundamental laser combined with intracavity Stokes conversion produces an efficient Raman laser. Allying both techniques, the Nd:YLF in DBMC configuration and the intracavity Raman generation, it was possible to generate an output power at 1163 nm of 3.2 W corresponding to a diode-to-Raman conversion efficiency of 8% with slope efficiency of 8.8 %. For the emission at 1147 nm, 3.5 W of output power was achieved with a diode-to-Raman conversion efficiency of 11% and slope efficiency of 9%. The beam quality was M² =1.9 and 1.1 in the horizontal and vertical direction, respectively. This is, to our knowledge, the first report of a side-pumped Nd:YLF/KGW intracavity Raman laser in DBMC configuration.

Conference Presentation

Citation Download Citation

Merilyn S. Ferreira, Helen M. Pask, and Niklaus U. Wetter "Nd:YLF/KGW intracavity Raman laser in DBMC configuration emitting at 1147 and 1163 nm in TEM₀₀", Proc. SPIE 11259, Solid State Lasers XXIX: Technology and Devices, 112590K (21 February 2020); https://doi.org/10.1117/12.2545092

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