Simple and practical method of characterizing the parametric down-conversion source
Wang Dong1, 2, †, Wu Juan1, 2, †, Zhao Liang-Yuan1, 2, An Xue-Bi1, 2, Yin Zhen-Qiang1, 2, ‡, Chen Wei1, 2, ‡, Han Zheng-Fu1, 2, ‡, Wang Qin3, ‡
       

(color online) (a) The predicted real coincidences between D1, D2 and D1, D3. (b) The predicted accidental coincidences between D1, D2 and D1, D3.