How to choose a good green laser pointer?
A good low power green high powered laser pen comprises a battery, a circuit board, a switch, a pump source, and in the pump source output light in front of the optical path, successively arranged as a laser working medium crystal and optical shaping system; The crystal is characterized in that the crystal is a self-doubling crystal, the self-doubling crystal is processed along the direction of the phase matching of the frequency doubling, the two pass light end face plating of the self-doubling crystal is conducive to pump light absorption, 1.05-1.1 μ m fundamental frequency light oscillation and 0.525-0.55 μ m frequency doubling output medium film, The thickness between the two through-light ends is 0.l_15mm; The pump source is a semiconductor laser diode; The pumping light of the semiconductor laser diode is injected into the self-doubling crystal. After the pumping light power reaches a certain value, the green laser is directly output from the self-doubling crystal. The self-frequency doubling crystal is neodymium doped yttrium calcaoborate Nd: YCa4O (BO3) 3 or gadolinium calcaoborate Nd: GdCa4O (BO3) 3, wherein the Nd3+ doping concentration is 0.001-0.25AT.
Tags
Mains
Low power (ImW) output difficulty. Because of good green laser high brightness, high directivity and the characteristics of sensitive to the human eye, make its in daily application security exists great potential danger to the human eye, therefore at present many developed countries in the world, such as the United States, Australia, etc.) are stated in "good green laser pen is not a toy", the power must be less than 5 mw, the best is lower than that of lmW. Because NchYVO4 is the most mature and effective medium and low power near-infrared laser material, and KTP is the most mature and effective green light band frequency double nonlinear material, the output power of the green laser pointer made is still far higher than the international safety standard even if the glue crystal composed of NchYVO4 is pumped by UK200mW, the smallest power available in the market. It is difficult to do ImW below, there are major security risks.
2021-12-01 12:27:12
Your Answer: