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AMPLITUDE MASK, AND APPARATUS AND METHOD OF MANUFACTURING LONG PERIOD GRATING FILTER USING THE SAME
AMPLITUDE MASK, AND APPARATUS AND METHOD OF MANUFACTURING LONG PERIOD GRATING FILTER USING THE SAME
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机译:使用相同的制造面罩,装置和方法的长周期滤网
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摘要
An amplitude mask, and an apparatus and method for manufacturing a long period grating filter using the same, are provided. When a long period grating is manufactured by selectively passing laser light to an optical fiber, the amplitude mask periodically passes laser light to the optical fiber. The amplitude mask includes two masks having periodically alternating pass areas for passing the laser light and nonpass areas for preventing passing of the laser light, wherein the two masks are continuously rotated in opposite directions. The period of the pass area thus continuously changes. In this mask, two masks each having a predetermined period are rotated in opposite directions, to thus provide an amplitude mask period depending on the angle of rotation. Thus, the period of the amplitude mask can be continuously changed.
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