NakuLaser Blog

The drive current source circuit model is shown in Figure 2. In the figure, H1 (s) and H2 (s) are the transfer functions of the control circuit, and H3 (s) is the transfer function of the DC / DC conversion circuit. The DC / DC conversion circuit consists of a voltage-controlled PWM-type high-efficiency switching power supply. The output voltage is the output voltage of the drive current source of the LD module and the relationship between the control voltage Vc is approximately: V0 = 5Vc + 6, (1) where 0 ≤ Vc ≤ 2. Laser diodes are non-linear devices. Their volt-ampere characteristics are similar to those of diodes. If they are equivalent to linear resistors (RD = VD / ID) near the operating point, VD and ID are the operating voltage and current of the LD module , Then the transfer function of the linearized model of the current source circuit shown in Figure 2 can be expressed as: I (s) = H0 (s) Vs (s) / [RD + Rf + RfH0 (s)], (2) where H0 (s ) = H1 (s) H2 (s) H3 (s). If the ...

It is a 520nm dot   laser module . It include a 1200mw laser, a voltage adjustable power supply, a module holder.  Green dot size is adjustable. The   520nm laser  is pure green. The light is clear and bright and soft and not glare. Let’s check it now.