期刊
MATERIALS
卷 7, 期 8, 页码 5520-5527出版社
MDPI AG
DOI: 10.3390/ma7085520
关键词
Anderson localization; optical fiber; random optical fiber; disordered optical fiber; nanostructured optical fiber; microstructured optical fiber; glass optical fiber; imaging fiber
类别
资金
- National Science Foundation [1029547]
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1029547] Funding Source: National Science Foundation
Disordered optical fibers show novel waveguiding properties that can be used for various device applications, such as beam-multiplexed optical communications and endoscopic image transport. The strong transverse scattering from the transversely disordered optical fibers results in transversely confined beams that can freely propagate in the longitudinal direction, similar to conventional optical fibers, with the advantage that any point in the cross section of the fiber can be used for beam transport. For beam multiplexing and imaging applications, it is highly desirable to make the localized beam radius as small as possible. This requires large refractive index differences between the materials that define the random features in the disordered fiber. Here, disordered glass-air fibers are briefly reviewed, where randomly placed airholes in a glass matrix provide the sufficiently large refractive index difference of 0.5 for strong random transverse scattering. The main future challenge for the fabrication of an optimally disordered glass-air fibers is to increase the fill-fraction of airholes to nearly 50% for maximum beam confinement.
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