We will present our results on fabricating transparent ceramic gain media with endcaps, planar and channel waveguides made by additive manufacturing, thin-disk structures with an undoped “face cap”, and laser rods where the doped core is surrounded by a clad. The ceramic optics are based on various garnet and sesquioxide compositions as well as for SrF2. Various gain and laser oscillation results are included as feasibility demonstrations.
Transparent ceramic Cerium-doped Gadolinium Yttrium Gallium Aluminum Garnet, GYGAG(Ce), offers a combination of environmental stability, high light yield, good gamma spectroscopy and formability into large plates that is attractive for implementation into Radiation Portal Monitors. GYGAG(Ce) plates at 4” x 4” x 0.5” scale achieve energy resolution of R(662 keV) <7%. Production of high transparency 8 in3 GYGAG(Ce) plates is underway, as well as their integration into detector modules and portal systems.
Transparent ceramic fabrication via solid state sintering is opening a path to a new category of laser gain media with tailor-made doping and index profiles. Techniques such as assembly of green structure pieces, direct ink writing, and Ink jet printing allow the fabrication of a wide variety of tailored optics including; slabs, rods, gradient doping, thin disks, ceramic-clad single-crystal fibers, and planar waveguides. The potential for 3D printed gain media to have a profound impact on new laser design and integrated optics is yet untapped. This work was performed under the auspices of the U.S. DOE by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. LLNL-ABS-816729
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