[1] Graf M, Arimondo E, Fry E S et al.. Doppler broadening and collisional relaxation effects in a lasing-without-inversion experiment. Phys. Rev. (A), 1995, 51(5):4030~4037
[2] Arimondo E. Relaxation processes in coherence-population trapping. Phys. Rev. (A), 1996, 54(3):2216~2223
[3] Wang Weisheng, Deng Le, Sun Zhenrong et al.. Line-shape variations of two-photon transitions based on quantum interference in Na2. J. Phys. (B), 2000, 33(11):2117~2123
[4] Cagnac F B B,Grynberg G. Experimental evidence of two-photon transition without Doppler broadening. Phys. Rev. Lett., 1974, 32(12):643~645
[5] Levenson M D, Bloembergen N. Observation of two-photon absorption without Doppler broadening on the 3S-5S transition in sodium vapor. , Phys. Rev. Lett., 1974, 32(12):645~647
[6] Bloembergen N, Levenson M D, Salour M M. Zeeman effect in two-photon 3S-5S transition in sodium vapor. Phys. Rev. Lett., 1974, 32(16):867~869
[7] Berman P R. Theory of collision effects in Doppler-free spectroscopy. Phys. Rev. (A), 1976, 13(6):2191~2211
[8] Wang Zugeng, Xia Huirong. Molecular and Laser Spectroscopy. Berlin: Springer-Verlag, 1991. 129~136
[9] Kopystyńska A, Moi L. Energy transfer in collision between excited atoms. Physics Reports, 1982, 92(4):135~181
[10] Xia H R, Yan G Y, Schawlow A L. Two-photon line shapes with near-resonant enhancement. Opt. Commun., 1981, 39(3):153~158