green laser pointer company has many professional technicians

green laser pointer  company has many professional technicians
Cavity into the FP etalon: Adjust the parameters of the FP etalon, making the range of the gain line width, only one transmission peak, only a transmission peak line width within a model to start, you can achieve single longitudinal mode job. Mode selection condition is: 1. Select the appropriate standards with the optical length, and quite free spectral range etalon and laser gain linewidth. Huaye  green laser pointer  company locates in eastern and western areas of Guangzhou development zone.So that the gain linewidth, and avoid the existence of two or more standard equipment through the peak. 2 select the appropriate standard with interface reflectivity, making the longitudinal mode was chosen adjacent longitudinal mode through the low, the loss of large inhibition of (3) three-mirror method: As shown, the laser end of the reflector is replaced by a combination of the three mirrors, which the M3 and M4 for the total reflection mirror M2 is a part of the transmission part of the mirror with the appropriate transmission rate. Huaye  green laser pointer  company has many professional technicians.This combination is equivalent to two coupling Figure 4-3 three-mirror resonator method two cavity longitudinal mode frequency spacing are as follows: laser single transverse mode selection of the transverse mode selection of the principle of laser oscillation threshold condition as follows: > aa total loss factor, it can be expressed as: the loss of which δi laser beam through the gain medium; δm for the loss generated by the laser beam in the resonator cavity mirror surface due to the transmission, scattering and absorption of other factors; δd laser The resonant cavity loss due to diffraction. The substance of the selected transverse mode make the transverse mode (usually the fundamental mode TEM00) meet on the type oscillation, leaving the unwanted transverse mode (usually the higher order mode) does not meet the above formula is suppressed, so as to achieve filter out the purpose of the higher order mode. G in the above equation, δ i, δm different transverse mode is the same, and thus meet the conditions of the oscillation threshold is mainly determined by the diffraction loss δd.Huaye  green laser pointer  company is equipped with anti-static dust-free plant. In order to achieve the above purpose, it should be to minimize the δi and δm, or relative growth δd, making the cavity total loss of a diffraction loss δd can play a decisive role, and therefore conducive to the election mode. The principle is often followed by the transverse mode selection: common principles of the transverse mode selection: the higher order transverse mode and the diffraction loss of the fundamental mode ① must try to increase the ratio (difference), that is, as far as possible to increase the ratio δ10/δ00. Relative to the fundamental mode so that higher order transverse mode is easier to inhibition is difficult to start; ② must minimize the wear and tear on the internal loss δi and mirror δm, while the relative increase of diffraction loss of δd in the total loss of a proportion.