A method for homogenizing and dissipating speckle by outputting laser light from an optical fiber
A technology of homogenization and speckle dissipation, applied in the field of laser applications, can solve problems such as unevenness and interference speckle, and achieve the effect of simple method and low cost
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Embodiment 1
[0039] Embodiment 1: A method for homogenizing and dissipating speckle by outputting laser light from an optical fiber, the steps are as follows:
[0040] (1) 2W fiber output laser, the fiber of quartz material is fixed in the ferrule of the fiber output laser connector, the output end face of the fiber is flush with the end face of the ferrule; the length of the fiber is 20cm, generally the shorter the fiber is, the more the light is affected by the internal mode of the fiber Seriously, the fiber diameter is 400 / 440, the numerical aperture is 0.22, the output wavelength is 808nm, and the positive and negative poles are energized at 2A to observe the spot; the spot is affected by the internal mode of the multimode fiber, and the spatial distribution is uneven, and there are dark centers and flashlight phenomena, such as Figure 5 as shown in a;
[0041] Turn off the power, take out and clean the output end face of the optical fiber, and remove the surface dirt. Such as figu...
Embodiment 2
[0048] Fiber output laser, without connector, bare fiber output. Fusion the output end of the fiber 1 to the fiber end cap 6. The fiber end cap 6 is a quartz column with a diameter larger than the fiber. Use the fiber end cap 6 with a diameter of 1.8 mm to fuse one end to the fiber 1 and grind the other end. The length is 8mm. Such as Figure 6 shown.
[0049] (1) Clean up the output surface of the optical fiber end cap 6 to remove surface dirt;
[0050] (2) Prepare the corrosive solution, mix HF and water according to the volume ratio of 1:10; suspend the optical fiber end cap in the prepared solution, immerse the optical fiber end cap in the corrosive liquid to a depth of 3 mm, corrode for 10 minutes and take out the optical fiber end cap The material of the fiber end cap is quartz, which is roughened by the action of HF acid; rinse the fiber end cap with deionized water, and pay attention to the corrosion damage of the solution to the human body during the whole process ...
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