Optical parametric oscillator for transparent or white plastic welding
A technology of optical parametric oscillators and white plastics, applied in lasers, laser components, phonon exciters, etc., can solve problems such as poor beam quality, high cost, and inability to achieve phase matching, so as to improve absorption efficiency and beam quality Good and efficient effect
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Embodiment 1
[0041] An optical parametric oscillator for welding transparent or white plastics, such as figure 2 As shown, it includes a semiconductor laser A1, a collimating focusing system A2, a resonator and a filter 6 arranged in sequence along the optical path; the resonator includes a laser input mirror 3, a nonlinear optical crystal 4 and a laser output mirror 5;
[0042] In this embodiment, the period of the optical superlattice crystal is 29 μm, the temperature of the optical superlattice crystal is controlled at 134° C., and the A working wavelength of the semiconductor laser is 980 nm.
[0043] The optical superlattice crystal is periodically poled potassium titanyl phosphate crystal (PPKTP).
[0044] After the pump light output by the semiconductor laser A1 is collimated by the collimation and focusing system A2, the pump light is incident into the resonant cavity, and the pump light is incident on the nonlinear optical crystal 4 after passing through the laser input mirror 3....
Embodiment 2
[0058] An optical parametric oscillator for transparent or white plastic welding provided according to Embodiment 1, the difference is that:
[0059] In this example, the working wavelength of the semiconductor laser A1 is 808nm, the output mode of the semiconductor laser A1 is fiber coupling output, and the angle a between the filter 6 and the optical path satisfies 30°.
[0060] The material of the laser input mirror 3 and the laser output mirror 5 is mid-infrared quartz. The mid-infrared quartz has the effect of transmitting the 2300nm and 1700nm idler light in the mid-infrared band, and realizes the positive feedback and mode selection of the resonant cavity.
[0061] In this embodiment, the nonlinear optical crystal 4 is a periodically poled lithium niobate crystal (PPLN), the period of the nonlinear optical crystal 4 is 20 μm, and the temperature of the nonlinear optical crystal 4 is controlled at 200° C.
[0062] In this example, by adjusting the temperature of the PPLN ...
Embodiment 3
[0064] An optical parametric oscillator for transparent or white plastic welding provided according to Embodiment 1, the difference is that:
[0065] Such as image 3 As shown, the optical parametric oscillator also includes a semiconductor laser B9 and a collimating and focusing system B8, and the resonator also includes a 45° harmonic mirror A7; a semiconductor laser B9, a collimating and focusing system B8, a 45° harmonic mirror A7, a nonlinear optical The crystal 4 is arranged along the optical path in turn, the 45° harmonic mirror A7 is at a 45° angle with the optical path, the laser output mirror 5 is arranged on one side of the 45° harmonic mirror A7, and the laser output mirror 5 is perpendicular to the optical path, and the semiconductor laser B9 The working wavelength is 808nm.
[0066] The optical superlattice crystal is periodically poled lithium tantalate crystal (PPLT).
[0067] After the pump light output by the semiconductor laser A1 is collimated by the coll...
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