• Ceramic Nd:YAG microchip provides high-efficiency laser output

    Working with the Japanese Technical Research Center (Kitakyushu, Japan) and Osaka Institute of Technology, researchers at the Japanese Institute for Molecular Science (Okazaki) recently demonstrated high-efficiency lasing from a diode-pumped ceramic chip of Nd:YAG. The polycrystalline YAG ceramic allows high neodymium doping levels that overcome the low absorption cross section; the absorption coefficient of a conventional Nd:YAG crystal is 3.45 cm-1 at 808 nm for a neodymium concentration of 0.
    March 1, 1999

    Ceramic Nd:YAG microchip provides high-efficiency laser output

    Working with the Japanese Technical Research Center (Kitakyushu, Japan) and Osaka Institute of Technology, researchers at the Japanese Institute for Molecular Science (Okazaki) recently demonstrated high-efficiency lasing from a diode-pumped ceramic chip of Nd:YAG. The polycrystalline YAG ceramic allows high neodymium doping levels that overcome the low absorption cross section; the absorption coefficient of a conventional Nd:YAG crystal is 3.45 cm-1 at 808 nm for a neodymium concentration of 0.9 at.%--at the 4.8 at.% used in their experiment, the researchers report absorption of the Nd:YAG ceramic as about 10 cm-1. The result is a device that produces an output power four times that of a conventional Nd:YAG crystal. According to researcher Takunori Taira, scattering losses for the ceramic microchip are much lower than for conventional ceramics. The test results, which were presented at February`s OSA Advanced Solid State Laser conference (Boston, MA), indicate that the Nd:YAG ceramic has potential as a microchip laser. Contact Takunori Taira at [email protected].

    Sign up for Laser Focus World Newsletters
    Get the latest news and updates.

    Voice Your Opinion!

    To join the conversation, and become an exclusive member of Laser Focus World, create an account today!