[3] W Peng, P Zhou D, L Chen et al. Optics Express, 27, 17069(2019).

[4] Y Luo, X Qu R, Q Chai et al. Optical Engineering, 58, 072005(2019).

[6] D Semrau, P Bayvel, R Killey. Optics Express, 25, 13024(2017).

[9] H Nishihara, R Ukita, T Imazono et al. Applied Optics, 57, 7770(2018).

[10] E Zadeh I, R Gourgues, W Elshaari A et al. Optics Express, 27, 3710(2019).

[11] Z Wang, X Li, C Wang et al. Journal of Lightwave Technology, 37, 2209(2019).

[12] L Kazanskiy N, G Serafimovich P. Pattern Recognition and Image Analysis, 25, 526(2015).

[13] Y Du, Z Han, W Cheng et al. Optics Express, 27, 16071(2019).

[14] M Seifert, M Alam, B Redding et al. Optica, 1, 175(2014).

[15] L O’Donnell, M Chen, D Bruce G et al. Optics Letters, 44, 1367(2019).

[16] F Liew S, B Redding, R Sarma et al. Nature Photonics, 7, 746(2013).

[17] Y Zhao, F Meng, H Wang et al. Optics Express, 27, 38349(2019).

[18] U Paudel, T Rose. Optics Express, 28, 16469(2020).