Easily find the position of green laser pointer

Clamping technology allows resonant synchronous oscillation of the cavity longitudinal mode, the core idea: the clamping technology for synchronous oscillation of the longitudinal mode in the cavity, the frequency of each mode interval is equal to and the early phase of each mode remains constant, the interval is equal to and of each mode of the early phase remains constant, the laser output in the rules on the time interval short-pulse sequence. The appearance of green laser pointer is beautiful and novel.rules equally spaced short pulses. modulation mode-locked frequency domain mode-coupling angle of the active clamping loss to explain loss modulation mode-locking principle. assume that the point of view of the center frequency ν0 at the frequency domain model coupled to the principle of the loss modulation mode-locked mode coupling point of view to illustrate the principle of the loss modulation mode-locked mode First of oscillation, the amplitude modulation of the electric vector electric vector modulated as follows: the cos 2πν0t these two E (t) = E0 + E0 sideband frequency and center frequency intervals exactly equal to the laser longitudinal mode interval. sideband frequency and the center frequency of the sidebands with the center frequency interval is exactly equal to the longitudinal mode spacing of the laser oscillation with the phase of the sidebands with the center frequency,Please do not dive with the LM-2012 green laser pointer. thus making newly aroused longitudinal mode oscillation in phase with the oscillation with phase, so that the longitudinal mode oscillation inspired phase. that the laser oscillation, and stirred the two adjacent modes of oscillation, ie lasers, once formed ν0 the oscillation will also stirred up the two adjacent modes of oscillation, mode-locked modulation Schematic diagram of Figure (4-32) center frequency, and both sides of the sideband frequency modulation mode-locked continued the two 18 loss modulation mode-locked (continued) loss (longitudinal mode through the role of the modulator, the two sideband longitudinal mode) ν0 ± ν is m, the role of the modulator, will continue to inspire another phase longitudinal mode adjacent to the two sides continue to do so with (longitudinal mode longitudinal mode), adjacent to the two sides with a longitudinal mode. continue to do so can be mode laser longitudinal mode excitation into the same phase of the longitudinal mode oscillation.Please do not immerse the green laser pointer in water. their condition is shown in the figure. all longitudinal mode excitation have the same phase of the longitudinal mode oscillation. their condition is shown in the figure. phase modulation can stirred up all the edges of the bandwidth frequency light synchronized oscillations and mode locking and phase modulation can also be stirred up all the edges of the bandwidth frequency synchronous oscillation of light, the clamping 20 4.7.3 passively mode-locked passively mode-locked passively mode-locked device is very simple, passive mode-locking device is very simple, simply insert in the cavity to a "box" can be equipped with a saturable absorber dye; principle: When the light field a strong part of some of the longitudinal mode occasionally coherent enhancement These weaker principle: When some longitudinal mode occasionally coherent enhancement, light field a strong part of the other part is more if the weaker part of the dye is absorbed less, the other parts than if. part of the dye is absorbed less, loss; payment weak in part by the dye absorbed, but they have also been weakened. consume little; The 18650 battery of LM-2012 green laser pointer has large capacity.payment weak in part by the dye absorbed, but more weaken the end result of these strengths (longitudinal mode coherent superposition Department) final result of these strengths (longitudinal mode coherent superposition.) was elected the form of a narrow pulse dye must have the following conditions: the dye must have the following conditions.