[1] Sugimoto A, Nobe Y, Yamagishi K. Crystal growth and optical characterization of Cr, Ca∶Y3Al5O12. J. Crystal Growth, 1994, (140):349~354
[3] Eilers H, Hommerich U, Jacobsen S M et al.. Spectroscopy and dynamics of Cr4+∶Y3Al5O12. Phys. Rev. (B), 1994, 49(22):15505~15513
[4] Zayhowski J J, Dill Ⅲ C. Diode-pumped passively Q-switched picosecond microchip lasers. Opt. Lett., 1994, 19(18):1427~1429
[5] Guillot D. Microlaser: Short pulses, Increase applications. Photonics Spectra, 1998, 2:143~146