Kwang-Hoon Ko, Kyung-Hyun Lee, Hyunmin Park, Jaemin Han, Yong-Ho Cha, Gwon Lim, Taek-Soo Kim, Do-Young Jeong. Frequency stabilization of the frequency doubled DOFA to the 127I2 line for calcium spectroscopy[J]. Chinese Optics Letters, 2012, 10(s2): S21903