Abstract

A new, to our knowledge, neodymium-doped lanthanum calcium borate crystal $({\mathrm{Nd}}^{3+}:{\mathrm{La}}_2{\mathrm{CaB}}_{10}{\mathrm{O}}_{19}, \mathrm{Nd}:\mathrm{LCB})$ has been grown by the flux method. The spectroscopic parameters for Nd:LCB crystal have also been calculated based on Judd–Ofelt theory. The intensity parameters ${\mathrm{\Omega }}_t$ are ${\mathrm{\Omega }}_2=4.96\times {10}^{-20} {\mathrm{cm}}^2,$ ${\mathrm{\Omega }}_4=3.94\times {10}^{-20} {\mathrm{cm}}^2,$ and ${\mathrm{\Omega }}_6=3.71\times {10}^{-20} {\mathrm{cm}}^2.$ The radiative lifetime ${\tau }_r$ is 349 µs. The absorption band at 800 nm has a FWHM of 12 nm. The absorption cross section is ${\sigma }_a=2.40\times {10}^{-20} {\mathrm{cm}}^2,$ and the emission cross sections at 1070 nm are ${\sigma }_X=3.02\times {10}^{-19} {\mathrm{cm}}^2,$ ${\sigma }_Y=2.33\times {10}^{-19} {\mathrm{cm}}^2,$ and ${\sigma }_Z=2.68\times {10}^{-19} {\mathrm{cm}}^2.$ The measured fluorescence lifetime ${\tau }_f$ is 64 µs, and the quantum efficiency η is 18.3%. In comparison with other Nd-doped laser crystals, the calculated parameters show that Nd:LCB crystal satisfies the fundamental spectral condition for laser emission.

© 2005 Optical Society of America

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