The dye laser material is the organic dye solution

For the customer to determine and judge whether Laser Pointer is good enough. 
Dye molecule level. The dye laser material is the organic dye solution. Each dye molecules are composed of many atoms, the energy level structure is very complex. Electronic movement, the movement of the dye molecules, including the composition of the dye molecules, the relative vibration between atoms and the rotation of the dye molecules, so the energy levels of the dye molecules, corresponding to each electronic energy level has a set of vibration of a rotational energy levels, and molecular collisions and electrostatic disturbances, vibration - rotational energy levels are broadened. Therefore, the dye molecules the energy level diagram of Figure (5-17) shows the quasi-continuous state level structure. Singlet and triplet two types of electron energy levels in the triplet state is slightly lower than the corresponding single-state level. It utilizes the advanced and perfect production method of Laser Pointer .
Dye laser pump. According to the particularity of these dye molecules ray radiation, the dye laser optically pumped. The distinction, according to the workings of a pulsed pump and continuous pump; in accordance with the pump source to distinguish between the flashlamp-pumped and laser-pumped. Only describes the pulse pumping. Pulse pumping power to the pump high enough and fast enough rise time, overcome the triplet to achieve laser operation. Characteristics of such devices is the high peak power of output laser devices of high conversion efficiency and simple structure, easy to operate. Flash pulse pump. Pumped with a flash, there are two structures, ordinary straight tube and coaxial type. Straight tubular flashlamp-pumped dye laser structure similar to the solid-state lasers. The manufacturer should try the best to improve the design and technology of Laser Pointer .
Flashlamp-pumped mode structure is simple, cheap, but the pump pulse wider (typically 10-4 to to ? 10-6 seconds), the triplet can not be completely eliminated, they must also add a quencher dye.
Figure (5-20) is a grating reflector tuning cavity grating G1 is placed in the cavity in the beam expander and dispersion effects. Different wavelengths of the G1 is a diffraction relative reflectance mirror R2 for different incidence angles. Thus, when the angle of incidence of a particular wavelength of rotation R2 is zero, the wavelength of light will be able to low-loss to return to the cavity, the formation of oscillation. Therefore, rotation R2 will play a tuning role. Grating - mirror tuning cavity. Figure (5-21) is a folding-pumped dye laser schematic diagram of the cavity to place the prism dispersive element. Prism dispersion characteristics of the pump light coupled into the cavity formed coaxial pump in the form and flow with the dye.