Laser pointer the dedicated laser head with amazing image formation

Laser pointer the dedicated laser head with amazing image formation and adjustment.
By early 1966 the OPO, the parameters fluorescence after that has been noted. Frequency doubling and optical rectification diagram as shown below (a) and (b), on behalf of the horizontal solid line in Figure media did not stimulate energy state, the horizontal dotted line for non-intrinsic state energy contour lines, single-line arrows indicate the photon transition pairs The line arrows represent the polarization field radiation. Parametric process to meet the conservation of energy or frequency matching relation. Multiplier (ω1 = ω2), and frequency, difference frequency generation and parametric oscillation energy to keep the horizontal can be summarized as ω1 + ω2 = ω3. The momentum of the light quantum K1, K2 and K3. Single process, the change in momentum Δk = K1 + K2-K3, Ki = (ni / c) ωiKi, i = 1,2,3. Ki is the unit vector in the direction of the wave normal. And of course the manufacturer of laser pointer  will be more competitive in the market.
Maxwell equations are linear differential equations, nonlinear differential equations in nonlinear optics. Set crystal permeability of L, B = H, the Maxwell equations, a considerable number of the fundamental frequency light into second harmonic; when z = 2lSHG, this conversion is nearing saturation, see Figure 2-2 . The ordinate behalf of the base frequency light into the crystal depth, solid lines represent the Ezω/E0ω, dotted lines represent the Ez2ω/E0ω. Tanh - (z / lSHG) → z / lSHG in the z-the << lSHG the case, so the multiplier light power S2αS1 of χ Z, of which S1 2 2 2 is the power of the fundamental frequency of light, Z is the thickness of the crystal. lSHG generally indicates the crystals used in frequency doubling technology should be the thickness of the PM direction. Therefore, the quality and performance of  laser pointer are the two important factors.This kind of laser pointer also can be used by the explorer
lSHG with the base frequency is inversely proportional to the amplitude of the light. Figure 2-2 the growth of the second harmonic and fundamental frequency of light attenuation Figure 2-3 a multiplier, it shows that, due to the nonlinear effects of the crystal, the incident wave frequency ω, polarized wave will contain fundamental wave (frequency ω), multiplier (frequency 2ω) and the DC component. Figure 2-3 octave polarization 2.3 phase matches the phase matching conditions have a critical impact on the nonlinear effects; If this condition is not met, the output light may be almost impossible observed. Is now a multiplier effect for the column, the side that matches the principles and various matching methods. SHG phase matching formula: 2k 2 = k 2 or 2k (ω) = k (2ω) formula (2-7) obtained directly from k = (n / c) ωK, type: n (ω) = n (2ω). It will influence the competition of the manufacturer of  laser pointer in the market.