Long period optical fibre grating ultraviolet laser point-to-point writing method
A fiber grating and ultraviolet laser technology, applied in the direction of cladding fiber, optical waveguide light guide, etc., can solve the problems of high cost, fixed grating wavelength, difficult to adapt to research, design and experiment, etc., and achieve the effect of saving production cost.
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[0022] The embodiment of the present invention means figure 1 As shown, the model of the laser 1 is Innova 300C Motofred (Coherent Company); the model of the acousto-optic regulator 3 is M110-4UV(BR)-AT4 (GOOCH&HOUSEGO).
[0023] The UV laser point-by-point writing method of long-period fiber grating is as follows:
[0024] I. Making optical path adjustment: the laser beam emitted by the laser 1 passes through the AOM 3 and then is reflected by the plane mirror 4, and then vertically enters the first cylindrical mirror 5 and the second cylindrical mirror 6; the first cylindrical mirror 5 and the second cylindrical mirror 5 The cylindrical mirrors 6 are placed orthogonal to each other, so that the laser beam is focused to form a concentrated energy spot;
[0025] II. Determination of fiber position: first clamp a test fiber in the V-shaped groove of the fiber clamp 11 at both ends of the precision electronically controlled mobile platform 9. When the laser spot is...
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