The rapid development of fiber lasers is being followed by wide ranges of applications in laser processing technologies. One of the key parameters to determine the laser-matter interaction is beam shape and there have been intense research activities on beam shaping using bulk optics. However, fiber optic solutions would take clear advantages over bulk optics especially for fiber laser sources in terms of the beam conversion efficiency, the throughput power, and the compact footprint. In this study, all-fiber optical beam shaping technologies are reviewed and they are categorized as the phase front modification on the fiber facet, the surface plasmonics on fiber, all-fiber Fourier transformation, and multimode interference. Their physical principles, beam shaping capability, and some of the novel applications are explained.
Bibliographical noteFunding Information:
Manuscript received August 24, 2018; accepted August 31, 2018. Date of publication October 29, 2018; date of current version May 1, 2019. This work was supported in part by the Institute of Physics and Applied Physics, Yonsei University; in part by the ICT R&D Program of MSIP/IITP (2014-3-00524); and in part by the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Science, ICT, and Future Planning (No. 2016k1A3A1A09918616). (Corresponding author: Kyunghwan Oh.) The authors are with the Photonic Device Physics Laboratory, Institute of Physics and Applied Physics, Yonsei University, Seoul 120-749, South Korea (e-mail:,email@example.com; firstname.lastname@example.org; email@example.com).
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All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics