LOW-POWER GREEN LASER PEN

摘要

A low-power green laser pen comprises a battery (1), a circuit board (2), a switch (3), a laser diode pump source (4), a self-frequency doubling crystal (5) and an optical shaping system (6) within a housing. The self-frequency doubling crystal (5) is processed into a slice along the frequency doubling phase matching direction. Each of two end faces for light transmission of the crystal slice is coated with a dielectric film which is favorable for the absorption of pumping light, the oscillation of the fundamental frequency light of 1.05µm-1.1µm and the output of the frequency doubling light of 0.525µm-0.55µm. The thickness between the two end faces is 0.1mm-15mm. The self-frequency doubling crystal (5) pumped by the laser diode outputs green laser directly. The low-power green laser pen has the characteristics of simple structure,small volume,low production cost, good stability, low power output, and it overcomes the related disadvantages of using traditional glued crystal.