[1] Michel Olivier, Michel Piché. Optics Express, 2016, 24(1): 2336.

[2] ZHAO Xing-tao, WANG Shu-tao, LIU Xiao-xu, et al(赵兴涛, 王书涛, 刘晓旭, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2016, 36 (6): 1650.

[3] SONG Zhao-yuan, LIU Xiao-dong, ZHANG Si-yuan, et al(宋昭远, 刘晓东, 张思远, 等). Infrared and Laser Engineering (红外与激光工程), 2015, 44(4): 1354.

[4] DAI Shi-xun, YU Xing-yan, ZHANG Wei, et al(戴世勋, 於杏燕, 张 巍, 等). Laser & Optoelectronics Progress(激光与光电子学进展), 2011, 48(9): 090602.

[5] WANG Ling-ling, GUO Yan-yan, TAN Fang, et al(王玲玲, 郭艳艳, 谭 芳, 等). Infrared and Laser Engineering(红外与激光工程), 2014, 43(11): 3718.

[6] SHI Qi, CHENG Hong, LU Jing-wen, et al(施 旗, 程 红, 吕景文, 等). Chinese Journal of Luminescence(发光学报), 2006, 26(3): 359.

[7] KANG Shuai, HE Dong-bing, GAO Song, et al(康 帅, 何冬兵, 高 松, 等). Journal of Inorganic Materials(无机材料学报), 2015, 30(11): 1177.

[8] Ratnakaram Y C, Babu S, Krishna Bharat L, et al. Journal of Luminescence, 2016, 175(2): 57.

[9] Novais A L F, Dantas N O, Guedes I, et al. Journal of Alloys and Compounds, 2015, 648(6): 338.

[10] Judd B R. Physics Review, 1962, 127(3): 750.

[11] Ofelt G S. Journal Chemical Physics, 1962, 37(3): 511.

[12] WANG Xue-jun, XIA Hai-ping, ZHANG Yue-pin(王雪俊, 夏海平, 张约品). High Power Laser and Particle Beams(强激光与粒子束), 2006, 18(10): 1731.

[13] ZHANG Yue-pin, XIA Hai-ping, ZHANG Jian-li, et al(张约品, 夏海平, 章践立, 等). Journal of the Chinese Rare Earth Society(中国稀土学报), 2005, 23(5): 551.

[14] QIN Zhong-xue, YUAN Xiao, XIONG Bao-xing, et al(秦忠雪, 袁 孝, 熊宝星, 等). Acta Photonica Sinica(光子学报), 2014, 43(6): 0616002.

[15] CHEN He, LIU Yue-hui, ZHOU Yue-fen, et al(陈 鹤, 刘粤惠, 周跃芬, 等). Journal of the Chinese Ceramic Society(硅酸盐学报), 2004, 32(2): 166.

[16] Chen D Q, Wang Y S, Yu Y L, et al. J. Phys. ＆ Chem. Solids, 2007, 68(2): 193.