Wavelength-dependent orientation of the principal axes of photonic crystal fibers measured by windowed Fourier-transform spectral interferometry

Horváth, Mercédesz; Nagyillés, Bálint G.; Grósz, Tímea; Kovács, A. P.

doi:10.1364/oe.381769

Cited by 1 publication

(1 citation statement)

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“…[38] Meanwhile, the topic of fiber orientation measurement, including photonic crystal fibers, is still addressed in recent publications. [19,39] Finally, it has been reported that analysis of a side illumination pattern of a fiber can be used for birefringent optical fiber positioning. [40] Expanded patterns of a fiber were photographed and analyzed.…”

Section: Optical Arrangementmentioning

confidence: 99%

Experimental Approach for Complex Optical Fiber Angular Orientation and Twist Measurement

Idrisov

Baghdasaryan

Rothhardt

et al. 2021

Advanced Photonics Research

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Applications associated with complex, structured optical fibers having no circular symmetry often require information about their specific angular orientation. Such cases include, for example, splicing, sophisticated mode coupling, selective fiber Bragg gratings inscription, or direction‐sensitive sensing. Besides the external angular orientation of the fiber, additionally an intrinsic twist of the internal fiber structure has been identified as a critical parameter for applications. Such an intrinsic fiber twist might occur as a side effect of the fiber drawing process, or it may have been introduced intentionally as a special fiber property. In all such cases, a measurement of the local orientation along the fiber is highly desirable. A method for such measurements based on the analysis of the refractive–diffractive scattering patterns is presented. By comparing such measured patterns with reference patterns from modeling or from reference measurements, the orientation of the fiber can be identified with high accuracy and without measuring or reconstructing the detailed cross section of a fiber. The method, therefore, provides an approach for quick identification of a local angular fiber orientation status.

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Section: Optical Arrangementmentioning

confidence: 99%