Schematic setup of mechanical Q-switched laser: G, the grating; M1, M2, focusing mirrors; CP, the chopper; ZS, window; LT, laser tube; OPM, the output mirror.
Laser output pulse wave form at the pulse repetition of .
The schematic diagrams of the two models: (a) Energy level structure related with laser dynamics for a molecule of 4LM. Levels 1 and 2 are the lasing levels. denotes the number of rotational levels involved in each manifold which related with laser levels, and denote the relaxation rates in or out of the lasing levels; (b) schematic energy-level diagram for 6TM, including collision processes. Continuous, arrowed lines denote V-V transitions; dotted, arrowed lines denote V-T energy transfer processes; dashed, arrowed lines denote electron excitation processes.
The time evolutions of the laser intensity and population inversion using the two models, respectively: (a) 4LM, solid line denotes the laser intensity and dashed line denotes the population difference, using =20, D0=0.30, and (b) 6TM, solid line denotes laser intensity and dashed one denotes energy difference between the two laser level, using , , and .
The time evolutions of the laser intensity as a function of the rotational levels : (a) 4LM, using , , and (b) 6TM, , .
Laser intensity in the cavity for different nondissociation coefficients using , for 6TM.
Laser intensity in the cavity for different electron densities using , for 6TM.
Comparisons of the experimental result and the two theoretical ones of the pulse wave form of the mechanical Q-switched laser using , for 4LM and , , and for 6TM.
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