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A manufacturing method of an optical filter and a device, optical filters, fiber holder having a spiral groove, and phase mask
A manufacturing method of an optical filter and a device, optical filters, fiber holder having a spiral groove, and phase mask
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机译:滤光器的制造方法和装置,滤光器,具有螺旋槽的光纤保持器以及相位掩模
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摘要
An optical filter is manufactured by placing a photosensitive optical fiber in a spiral arrangement on a fiber holder, preferably having a spiral groove for holding the fiber, and exposing the fiber to ultraviolet light through a phase mask having a spiral diffraction grating, forming an in-fiber Bragg grating. The fiber can be conveniently scanned by an ultraviolet beam as the fiber holder and phase mask turn on a rotating stage. The fiber can be compactly packaged between the fiber holder and a cover. The fiber holder and cover can be formed by coating a substrate with layers of polymer material, the spiral groove being formed by photolithographic patterning of one of the layers.
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