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A fiber coupling, laser technology, applied in the direction of light guide, optics, instruments, etc., can solve the problem of reducing the flexibility of the laser placement position, and achieve the effect of improving the belt ring, uniform spot, and uniform distribution
Active Publication Date: 2015-07-15
Shandong Huaguang Optoelectronics Co. Ltd.
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In this method, adding mixed-mode materials in the optical fiber protection sleeve increases the diameter of the sleeve, and the hardness of the laser pigtail will also be greatly increased, which is not easy to bend during use, thus reducing the flexibility of laser placement.
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Embodiment 1
[0044] Such as Figure 1-3 As shown, a fiber-coupled semiconductor laser spot homogenization device includes an optical fiber 1 passing through a flexible tube 2 in the axial direction, and a protective tube 4 coaxially installed with the optical fiber 1 is arranged outside the flexible tube 2 .
[0045] The diameter of the optical fiber 1 is 125 μm.
[0046] In the flexible tube 2 , the optical fiber 1 is installed in the flexible tube 2 perpendicular to the direction of the optical fiber 1 through two fixed ends 3 .
[0047] The fixed end 3 is glue.
[0048] The glue is epoxy resin.
[0049] The flexible tube 2 is a heat-shrinkable tube.
[0050] The flexible pipe 2 is a closed cylinder.
[0051] The protection tube 4 is polyvinyl chloride (ie PVC) material.
[0052] The protective tube 4 is a cylindrical sleeve with armor.
[0053] The diameter of the protective tube 4 is larger than that of the flexible tube 2 .
[0054] Both ends of the protection tube 4 are respec...
Embodiment 2
[0056] A fiber-coupled semiconductor laser spot homogenization device as described in Embodiment 1, the difference is that the diameter of the optical fiber 1 is 220 μm.
[0057] The fixed end 3 is a snap ring.
[0058] The flexible pipe 2 is a PVC pipe with thermal shrinkage properties.
Embodiment 3
[0060] A fiber-coupled semiconductor laser spot homogenization device as described in Embodiment 1, the difference is that the diameter of the optical fiber 1 is 308 μm.
[0061] The flexible pipe 2 is a PVC pipe with thermal shrinkage properties.
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Abstract
The invention provides an optical fiber coupling output laser spot homogenizing device which comprises an optical fiber axially penetrating through a flexible pipe, wherein a protection pipe is arranged at the outer part of the flexible pipe, and the protection pipe and the optical fiber are coaxially mounted. By heating the flexible pipe, the flexible pipe shrinks due to heating, which is equivalent to the fact that a stress is applied to the optical fiber sleeved by the flexible pipe, so that the optical fiber uniformly and continuously deforms, the deformation can change the distribution of laser energy inside the optical fiber in each mode, such that light is relatively uniformly distributed in each mode of the multi-mode optical fiber, and thus spot of the output light beam is relatively uniform and the phenomena of ringing and speckling are improved. The device is simple to operate and high in applicability, and is especially suitable for an optical fiber coupling output semiconductor laser.
Description
technical field [0001] The invention relates to a light spot homogenization device of an optical fiber coupled output laser and a preparation method thereof, belonging to the technical field of optical fiber optics. Background technique [0002] Semiconductor lasers output through multimode fibers are widely used in many fields, such as laser marking, laser cutting, laser lighting, semiconductor laser pumping solid-state lasers, etc. In many applications, the beam distribution is required to be uniform. Since the laser has a variety of high-order mode distribution forms when it is transmitted in a multimode fiber, the output laser beam has rings and uneven distribution, and the beams interfere with each other. Sexual interference image points are called "speckle". However, fields such as night vision and lighting require uniform light spots and no speckle phenomenon, so there are certain limitations when the laser output by multimode fiber is used in this series of fields. ...
Claims
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Application Information
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