Jingui Ma, Jing Wang, Peng Yuan, Guoqiang Xie, Liejia Qian, "Origin and suppression of back conversion in a phase-matched nonlinear frequency down-conversion process," Chin. Opt. Lett. 15, 021901 (2017)

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- Chinese Optics Letters
- Vol. 15, Issue 2, 021901 (2017)

Fig. 1. Pulse profiles of input waves W 3 and W 2 . A , B , and C are the three calculation points in the following simulation corresponding to t = 0 , 50, and 100 ps, respectively.

Fig. 2. Intensity and phase evolutions of the three interacting waves. (a) Intensity evolutions of W 1 (blue solid curve), W 2 (red solid curve), and W 3 (black solid curve) within the crystal. The black dashed curve represents the calculated value of sin θ . (b) Phase evolutions of W 1 (blue curve), W 2 (red curve), and W 3 (black curve) within the crystal. All the intensities and phases in this figure are calculated at point A , as shown in Fig. 1 .

Fig. 3. Intensity evolutions of W 2 at three different temporal points. The black, red, and blue curves correspond to points A , B , and C in Fig. 1 , respectively.
![Intensity and phase evolutions of W1 (blue curves), W2 (red curves), and W3 (black curves) under the conditions of αLnl=2 [(a) and (c)] and 8 [(b) and (d)]. All calculations correspond to point A in Fig. 1.](/Images/icon/loading.gif)
Fig. 4. Intensity and phase evolutions of W 1 (blue curves), W 2 (red curves), and W 3 (black curves) under the conditions of α L nl = 2 [(a) and (c)] and 8 [(b) and (d)]. All calculations correspond to point A in Fig. 1 .

Fig. 5. Intensity evolutions of W 2 under the conditions of α L nl = (a) 2 and (b) 8. The black, red, and blue curves correspond to points A , B , and C in Fig. 1 , respectively.

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