A Static Laser Speckle Suppression Method Combining Multimode Optical Waveguides and Diffractive Optical Devices
A multi-mode optical waveguide and diffractive optics technology, applied in optical components, laser optical equipment, optics, etc., can solve problems such as insufficient speckle suppression, slow response time, and large size, and achieve simple and easy maintenance of the system. Fast, Small Effects
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Embodiment 1
[0055] A static laser speckle suppression method combining a multimode optical waveguide and a diffractive optical device, wherein the diffractive optical device adopts two one-dimensional pseudo-random sequence binary codes to be orthogonally superimposed into a two-dimensional binary code (see attached figure 2 ), the overlapping angle is 90 degrees, the minimum coding width of the binary code is 6 microns, and the number of bits of the pseudo-random sequence code is 13.
[0056] See attached image 3 (a), the multimode optical waveguide is a multimode optical fiber, the core layer of the multimode optical fiber is a cylindrical optical waveguide with a diameter of 400 microns, and the length l of the multimode optical fiber is 1500 mm.
[0057] See attached figure 1 , the static laser speckle suppression method combined with multimode optical waveguide and diffractive optical device, its function is realized by the static laser speckle suppression system. The static lase...
Embodiment 2
[0061] See attached image 3 (b), the multimode optical waveguide adopts a multimode optical fiber bundle, the diameter of the multimode optical fiber bundle is 5 millimeters, and each multimode optical fiber in the multimode optical fiber bundle has a circumcircle diameter of 25 microns The hexagonal cylindrical optical waveguide, the length l of the multimode optical fiber bundle is 2500 mm. Other implementation parameters and processes are the same as in Example 1.
[0062] The laser speckle suppression effect is a speckle suppression factor of 2.4.
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