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Improved direct bonding method of Nd:YVO$$_{4}$$ and YVO$$_{4}$$ laser crystals

Sugiyama, Akira; Nara, Yasunaga

We succeeded in the fabrication of bonded laser crystals composed of a neodymium-doped YVO$$_{4}$$ laser crystal (Nd:YVO$$_{4}$$) and its host crystals YVO$$_{4}$$ by a newly developed dry etching technique using an argon ion beam. The optical distortion caused by the bonded interface of size 5 mm $$times$$ 6 mm was estimated to be 0.05-wave at 633 nm. From the comparison of laser performance pumped by a laser diode, the bonded crystals could increase the laser output power by nearly twice that of the non-bonded crystals with the same degree of polarization of 99.2 %. To analyze the mechanism of the enhanced reduction of the thermal load in the bonded crystals, numerical simulations with a finite-element method were also performed.

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Category:Materials Science, Ceramics

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