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Optically pumped organic dye in liquid solution is an application of spectroscopy was the most common and most flexible laser. The use of different organic dyes having an output wavelength of 340nm from the ultraviolet through the visible band has been up to near-infrared 1200nm. So far, 100 kinds of dye-dye laser can be used as the medium, each dye can be limited in the wavelength region of a continuous tuning. Different areas of the tunable dye overlap, so that we determine the spectrum for a Chief to find the appropriate one or often several dyes as the spectral region of the light source. The drawing of hermes handbags are one of the inspection items.Figure 4 shows a typical energy level diagram of dye molecules. S. For the ground state, S1, Sz for the singlet excited state, and Ti, T: for the triplet excited state. Complex dye molecules in close proximity to the vibrational and rotational energy levels, these levels quickly between relaxation. The separation structure of the vibrational energy level broadening resulting overlap between the energy levels form quasi-continuous spectrum, so that the dye Hermes Kelly bags 28 over a wide spectral region continuously tunable. Typically, a molecular electronic excited states of the nuclear separation distance is different from the nuclear ground state, so the excited state and ground state potential well at the end of the deviation, shown in Figure 4. According to Franck-Condon principle, molecular electronic states of transition will occur in those who did not change nuclear energy level spacing between. Shown in Figure 4 in the ground electronic state S. Low vibrational levels of molecular absorption of a photon into the electronic excited state S1 bound to the high vibrational levels. The worker is preparing the delivery of kelly handbag. In the solution of the dye molecules in a typical high-S1 vibrational relaxation to the low vibrational states in the order of ps or less than the order of 51 lls state radiative lifetime is much shorter. Therefore, the fluorescence from the S1 or laser shown in Figure 4 from the low vibrational S1 to S. High vibrational states. And S. State quenching of high vibrational levels of the order of the fast process is Ps. This is a typical four-level laser system. Another basic feature dye molecules, the absorption spectrum peak wavelength than the corresponding emission spectra generally peak wave length, called the Stokes shift.