Flux-grown Nd:YAG crystals make high-power microcavity laser

Scientists from Polaroid Corp. (Cambridge, MA) report single-frequency output power of 210 mW on the 1.319-µm transition from flux-grown monolithic YAG crystals doped with 4.2% neodymium (Nd) and pumped by two polarization-combined 1-W near-infrared laser diodes. The crystals were fabricated into plane-parallel resonators with a 450-µm cavity length, resulting in compact devices suitable for use in fiberoptic networks. The short-cavity Fabry-Perot design is insensitive to pump-beam align

Jerry R. Hobb

Lower thresholds and higher power from visible semiconductor lasers

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