4.5 Article

Optical Fiber Diffraction Gratings

Journal

IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 34, Issue 3, Pages 177-180

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2022.3145037

Keywords

Diffraction; Diffraction gratings; Fiber gratings; Optical fibers; Ultrafast optics; Optical fiber sensors; Lighting; Fiber diffraction grating; femtosecond laser micromachining; diffraction light enhancement

Funding

  1. National Natural Science Foundation of China [61975192]

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Optical fiber diffraction gratings with periodic structure fabricated by femtosecond laser are proposed and demonstrated. The adoption of multiple layer gratings greatly enhances the diffraction patterns and enables the construction of an optical fiber in-line Mach-Zehnder interferometer. These fiber diffraction gratings are characterized by high robustness, good operation stability, and great potential for various photonics applications.
Optical fiber diffraction gratings with periodic structure across the fiber section and fabricated by femtosecond laser are proposed and demonstrated. The diffraction patterns can be clearly observed and greatly enhanced by adopting multiple layer gratings. An optical fiber in-line Mach-Zehnder interferometer can be constructed by use of multiple layer diffraction grating pairs. The fiber diffraction gratings represent a new type of optical fiber device featured with high robustness, good operation stability and great potential for many photonics applications.

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