Friday, August 17, 2012

green laser pointer company has rich professional technical experience

green laser pointer  company has rich professional technical experience
The Fresnel number is a characteristic parameter for the characterization of the resonator diffraction losses. The diffraction loss curve of a diffraction loss and the relationship of the Fresnel number N is generally more complex, and often write the analytic expression and digital computer calculation. Therefore, usually the count results are plotted into a curve, which is called the diffraction loss curve. The picture of a confocal cavity and the circular cross section of circular cross section parallel to the curve of the planar cavity, 1. N greater the smaller the δ D; In the same N, the transverse mode the higher the ordinal number of δ D greater; in the same N and the same number of cross-motif confocal cavity is much smaller than the plane parallel to the cavity, which is due to concave mirror The convergence of the role of light is more concentrated in the center of sake. Huaye  green laser pointer  company has rich professional technical experience in optics.The one-way diffraction loss of the symmetric cavity TEM00 mode changes with the Fresnel number is drawn. In the same N, the closer the confocal cavity (g = 0), the smaller the diffraction loss. Mode volume of the fundamental mode volume in a model used to describe the spatial extent of the expansion mode in the cavity. Mode volume oscillation in this mode, the role of the number of excited particles, and thus, the output power. On the contrary, the mode volume is small, the output power is small. The volume of the fundamental mode varies with the cavity and g N parameters change.Huaye green laser pointer  company has rich professional technical experience in machine. The structural parameters of the cavity; Fresnel number resonator theory analysis shows that, when considering the symmetric cavity (R1 = R2), the fundamental mode (TEM00) Gaussian beam waist of W0 can be expressed as follows: with the following properties: (1) mirrors radius of curvature R is increased, the fundamental mode waist W0 increases, thus the volume of the fundamental mode increases. Therefore, the parallel plane cavity larger mode volume. ② When the R value W0 with the cavity L changes there is a great value, we can draw the maximum conditions for L = R (confocal cavity). More than the nature of practical significance in the election mode technology. In addition, the transverse mode selection is also a necessary condition for single-frequency lasers required. Only selected on the basis of a single transverse mode single longitudinal mode laser to get single-frequency oscillation. Huaye  green laser pointer  company has successfully researched and developed several laser products.Laser single transverse mode selection method (1) the choice of cavity parameters g, N transverse mode of the cavity is different cavity cross mold the diffraction losses under.

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