Apparatus and method for laser processing a material
A laser processing and laser technology, applied in laser welding equipment, metal processing equipment, optics, etc., to achieve the effect of simplifying automatic control and improving the control range
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example 1
[0129] Figure 20 A first example of the present invention is shown. figure 1 The extrusion mechanism shown in 5 is applied to Figure 11 The first optical fiber 90. Core 91 support Figure 12 The schema of 121 and Figure 13 The second-order modulo 122 of . The fundamental mode 121 propagates in the core 91 as indicated at point A above and below the first optical fiber 90 . The core 91 has a diameter 92 of the order of 15 μm and a refractive index 96 greater than the cladding index 99 by 0.0034. The extrusion mechanism 5 has a pitch 7 that matches the difference in the effective refractive indices 97 and 98 of the optical modes 121 and 122 such that the pitch 7 = 2π / Δβ. By adjusting the extrusion force 12 applied by the extrusion mechanism 5, the laser radiation 13 output by the first optical fiber 90 can be Figure 20 Points B above and below the first optical fiber 90 indicate switching between the fundamental mode 121 and the second-order mode 122 . Switching betw...
example 2
[0134] Figure 21 A second example of the invention is shown in which the first optical fiber 90 of the first example has been replaced by an optical fiber 140 . figure 1 The extrusion mechanism shown in 5 is applied to Figure 14 Fiber 140 shown in. The core 91 has a diameter 92 of about 15 μm and a refractive index 96 greater than the cladding index 99 by 0.0034. The core 91 may support a fundamental mode 121 having an effective index of refraction 97 . The four satellite cores 141 each have a diameter 143 of 6.6 μm, a refractive index 142 that is 0.003 greater than the cladding index 99 , and an outer edge-to-outer edge distance 149 of 36.6 μm. Satellite core 141 may propagate mode(s) 151 having effective index 143 . The extrusion mechanism 5 has a pitch 7 designed to match the difference in effective indices of refraction 97 and 143 such that pitch 7 = 2π / Δβ. like Figure 21 As shown, by adjusting the squeeze force 12 applied by the squeeze mechanism 5 , either the f...
example 3
[0137] Figure 22 A third example of the invention is shown in which the second optical fiber 140 of the first example has been Figure 16 The second optical fiber 160 is replaced, and the third optical fiber 180 of the first example has been replaced by the reference Figure 19 Said third optical fiber 190 instead. The design of the first optical fiber 90 is with reference to the first example and Figure 20 Same as described.
[0138] The first optical fiber 90 is spliced to Figure 16 The second optical fiber 160 is shown. The central core 91 of the second optical fiber 160 has the same design as the core 91 of the first optical fiber 90 . The annular core 161 has an outer diameter 169 of 40 μm, a thickness 164 of 5 μm, and a refractive index 162 greater than the cladding index 99 by 0.0026. When the squeeze mechanism 5 is adjusted so that the output of the first optical fiber 90 is the fundamental mode 121, the fundamental mode 121 is successfully coupled to the co...
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