Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Akira Sasaki and Jisuke Fukaya and Yujin Zheng and Xin Gao and Hisayuki Aoyama,Double phase-conjugate mirrors in KNSBN:Cu crystal,SPIE Proceedings,0277-786X,SPIE,1994-08-05,2321,,568,https://cir.nii.ac.jp/crid/1873398392368193664,https://doi.org/10.1117/12.182071