Role of weak transitions in multiphoton excitation of molecules by IR laser radiation

1978 ◽  
Vol 25 (3) ◽  
pp. 337-342 ◽  
Author(s):  
I.N. Knyazev ◽  
V.S. Letokhov ◽  
V.V. Lobko
Keyword(s):  
Laser Radiation ◽  
Multiphoton Excitation ◽  
Ir Laser ◽  
Weak Transitions

Role of coherence in multiquantum excitation of molecules by IR laser radiation

1983 ◽  
Vol 38 (1) ◽  
pp. 63-72 ◽  
Author(s):  
A. M. Samson ◽  
V. A. Savva ◽  
G. K. Paramonov
Keyword(s):  
Laser Radiation ◽  
Ir Laser

scholarly journals Selective IR Laser Induced Isomerization and Dissociation of BIS (Trifluoromethyl) Ketene Molecules

1996 ◽  
Vol 16 (4) ◽  
pp. 255-264 ◽  
Author(s):  
V. B. Laptev ◽  
L. M. Tumanova ◽  
E. A. Ryabov
Keyword(s):  
Laser Radiation ◽  
Oxygen Isotopes ◽  
Second Harmonic ◽  
Multiphoton Excitation ◽  
Radiation Frequency ◽  
Isomerization Product ◽  
Harmonic Radiation ◽  
Ir Laser ◽  
Maximum Value ◽  
Second Harmonic Radiation

Multiphoton IR laser induced isomerization and dissociation of (CF3)2C=C=O (FMK) molecules have been studied. The antisymmetric stretch v1 = 2192 cm-1 of C=C=O—and antisymmetric v16 = 991 cm-1 of C—C— bonds were excited by the second- and first harmonics of a pulsed TEA CO2 laser. The dependence of isomerization conversion on laser radiation frequency, fluence, and number of shots was measured. The isomerization channel was predominant compared with dissociation for the conditions of IR multiphoton excitation under study.The isomerization of FMK by the second–harmonic radiation of a CO2 laser was proved to be selective with respect to oxygen isotopes. The isomerization product (FMA molecules) was enriched with 18O with maximum value of selectivity α(18/16) = 3.9 when FMK molecules were excited at 2ωlas = 2143.8 cm-1.

Role of light-induced scattering in the optical limitation of laser radiation on the basis of fullerene-containing media

2001 ◽  
Vol 90 (2) ◽  
pp. 292-301 ◽  
Author(s):  
I. M. Belousova ◽  
V. A. Grigor’ev ◽  
O. B. Danilov ◽  
A. G. Kalintsev ◽  
A. V. Kris’ko ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Optical Limitation ◽  
Role Of Light
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