Power scaling of semiconductor laser pumped Praseodymium-lasers

Abstract

We report on efficient lasing of Pr-doped fluoride materials with cw output powers up to 600 mW in the visible spectral range. Praseodymium doped LiYF(4) and LiLuF(4) crystals were pumped either by an intracavity frequency doubled optically pumped semiconductor laser with output powers up to 1.6 W and nearly diffraction limited beam quality or by a multimode GaN-laser diode with an output power of about 370 mW. Furthermore, intracavity frequency doubling of the red Pr-laser radiation to 320 nm reaching output powers of more than 360 mW with a conversion efficiency of 61% and an optical-to-optical efficiency of 22% are presented.

Semiconductor disk lasers for the generation of visible and ultraviolet radiation

“…Indeed, in the spectral range of interest to this paper, Ti:sapphire [29] and Pr:fluoride lasers [30] are two specific examples of sources which can take full advantage of stable, high-power good beam quality pumps emitting respectively at 532 and 480 nm, as may be provided by SDLs.…”

“…4). Pr 3+ fluoride lasers on the other hand offer much better efficiency [30], however these lasers operate on fixed discrete transition lines without the wavelength flexibility and tunability that are the main advantages of SDLs.…”

“…The alternative is in fact to pump with a frequency-doubled SDL which is tuned to this absorption peak [30].…”

“…QWs and therefore include a high number (20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30) of QWs [87,88]. The addition of AlGaAs carrier-blocking layers to prevent long-range diffusion of carriers in the barriers is also deemed advantageous [87] (see Fig.…”

Effect of Ce co-doping on KY3F10:Pr crystals

“…Moreover it presents good optical and thermomechanical properties, all fascinating features for optically based applications [8]. Among RE dopant ions, Praseodymium shows quite strong visible emissions in the green, orange, red and infrared regions making it one of the most important dopant for laser applications [4,5,9,10,11].…”