28 January 2005 Efficient potassium gadolinium tungstate Raman lasers generating single or multiple wavelengths spanning the green to red
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Abstract
We review our recent studies into external cavity and intracavity potassium gadolinium tungstate Raman lasers generating output wavelengths in the range 555 nm to 669 nm. We have characterised the performance external cavity Raman lasers pumped by Q-switched 532 nm pump lasers at 5-10 kHz pulse repetition rates generating either single output wavelengths or multiple wavelengths simultaneously. Single output wavelengths are obtained with slope efficiencies up to 68% and maximum output powers ~0.5 W. Simultaneous output at 5 wavelengths (eg., 532 nm, 559 nm, 589 nm, 622 nm and 658 nm) is demonstrated with ~100 mW output power for at least 3 lines. Using the intracavity Raman laser scheme, we demonstrate a 0.3-1.8 W laser that is "user switchable" amongst wavelengths spanning the green to red eg., 532 nm - 555 nm - 579 nm - 606 nm, the wavelengths corresponding to frequency sums and mixing of Stokes and fundamental intra-cavity fields.
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Richard P. Mildren, Richard P. Mildren, H. M. Pask, H. M. Pask, T. McKay, T. McKay, J. A. Piper, J. A. Piper, } "Efficient potassium gadolinium tungstate Raman lasers generating single or multiple wavelengths spanning the green to red", Proc. SPIE 5646, Nonlinear Optical Phenomena and Applications, (28 January 2005); doi: 10.1117/12.576242; https://doi.org/10.1117/12.576242
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