[1] M Goppert-Mayer. Uber elementarakte mit zwei quantensprüngen [J]. Annalen der Physik, 1931, 401(3): 273-294.
[2] W Kaiser, C G B Garrett. Two-photon excitation in CaF2:Eu2+ [J]. Phys Rev Lett , 1961, 7(6): 229-231.
[3] G S He, J D Bhawalkar, C F Zhao, et al.. Optical limiting effect in a two-photon absorption dye doped solid matrix [J]. Appl Phys Lett, 1995, 67(17): 2433-2435.
[4] G S He, C F Zhao, J D Bhawalkar, et al.. Two-photon pumped cavity lasing in novel dye doped bulk matrix rods [J]. Appl Phys Lett, 1995, 67(25): 3703-3705.
[5] J D Bhawalkar, G S He, C K Park, et al.. Efficient two-photon pumped green upconverted cavity lasing in a new dye [J]. Opt Comm, 1996, 124(1-2): 33-37.
[6] G S He, L X Yuan, Y P Cui, et al.. Studies of two-photon pumped frequency-upconverted lasing properties of a new dye material [J]. J Appl Phys, 1997, 81(6): 2529-2537.
[7] G S He, G C Xu, P N Prasad, et al.. Two-photon absorption and optical-limiting properties of novel organic compounds [J]. Opt Lett, 1995, 20(5): 435-437.
[8] G S He, C Weder, P Smith, et al.. Optical power limiting and stabilization based on a novel polymer compound [J]. IEEE J Quantum Electron, 1998, 34(12): 2279-2285.
[9] G S He, R Gvishi, P N Prasad, et al.. Two-photon absorption based optical limiting and stabilization in organic molecule-doped solid materials [J]. Opt Commun, 1995, 117(1-2): 133-136.
[10] G S He, L Yuan, N Cheng, et al.. Nonlinear optical properties of a new chromophore [J]. J Opt Soc Am B, 1997, 14(5): 1079-1087.
[11] M Albota, D Beljonne, J L Brédas, et al.. Design of organic molecules with large two-photon absorption cross sections [J]. Science, 1998, 281(5383): 1653-1656.
[12] J E Ehrlich, X L Wu, I Y S Lee, et al.. Two-photon absorption and broadband optical limiting with bis-donor stilbenes [J]. Opt Lett, 1997, 22(24): 1843-1845.
[13] Wang Guoping. Progress in the application of two-photon excitation [J]. Physics, 2000, 29(9): 546-549.
[14] T F Boggess, K M Bohnert, K Mansour, et al.. Simultaneous measurement of the two-photon coefficient and free-carrier cross section above the bandgap of crystalline silicon [J]. Quantum Electron, 1986, 22(2): 360-368.
[15] M Sheik-Bahae, A A Said, E W Van Stryland, et al.. High sensitivity, single beam n2 measurements [J]. Opt Lett, 1989, 14(17): 955-957.
[16] D A Oulianov, I V Tomov, P M Rentzepis, et al.. Observation on the measurement of two-photon absorption cross-section [J]. Opt Commun, 2001, 191(3-6): 235-243.
[17] L W Tutt, T F Boggess. A review of optical limiting mechanisms and devices using organics, fullerenes, semiconductors and other materials [J]. Prog Quant Electr, 1993, 17(4): 299-338.
[18] Cao Lan, Yan Xiaona, Dai Ye, et al.. Space-to-time conversion by femtosecond spectrum holography [J]. Acta Optica Sinica, 2012, 32(6): 0609001.
[19] Jin Sai, Tan Wenjiang, Liu Xin, et al.. Temporal and spatial characteristics of ultrashort pulse propagation in turbid media [J]. Chinese J Lasers, 2014, 41(7): 0702004.
[20] Chai Lu, Hu Minglie, Fang Xiaohui, et al.. Advances in femtosecond laser technologies with photonic crystal fibers [J]. Chinese J Lasers, 2013, 40(1): 0101001.
[21] Ye Peixian. Nonlinearly Optical Physics [M]. Beijing: Peking University Press, 2007. 37-39.