Development of an embedded instrument for autofocus and polarization alignment of polarization maintaining fiber

Feng, Di; Fang, Qimeng; Huang, Huaibo; Zhao, Zhengqi; Song, Ningfang

doi:10.1117/1.oe.56.12.124103

Cited by 2 publications

(2 citation statements)

References 17 publications

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“…Orientation and angular matching of an optical fiber is an essential task for polarization, maintaining fibers with a number of publications dedicated to it, mainly based on an end face observation. [36,37] Some of these fibers with anisotropy have multielement structure, such as Panda or Bow-tie fibers. A few articles reported side image analysis of such fibers, for which the main challenge is the imaging of the cores and stress-inducing elements, which have low contrast and are hardly distinguishable from cladding.…”

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%

Experimental Approach for Complex Optical Fiber Angular Orientation and Twist Measurement

Idrisov

Baghdasaryan

Rothhardt

et al. 2021

Advanced Photonics Research

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show abstract

“…Several polarization alignment methods have been developed in the last decades for highly birefringent fibers and PMFs. The simplest ones are based on the direct observation of the fiber ends using a microscope [1], a CCD camera [2,3] or a polarization alignment instrument that is specially developed for PANDA type PMFs [4]. There are more precise methods, based on monitoring the change in the phase difference between the polarization modes, which rely on the rotation of the polarization plane of the light beam [5] or the rotation of the fiber itself [6].…”

Section: Introductionmentioning

confidence: 99%

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

Horváth¹,

Nagyillés²,

Grósz³

et al. 2020

Opt. Express

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We present a novel polarization alignment technique based on windowed Fouriertransform (WFT) spectral interferometry to determine the wavelength-dependent orientation of the principal polarization axes of photonic crystal fibers (PCFs). To test the technique, a commercially available, 82.5-cm-long HC-800-02 type hollow-core PCF was measured. The angles belonging to the fast and the slow principal axes of the fiber were determined from the peak intensity values of the ridges in the WFT map at different wavelengths. We demonstrate that the orientation of the principal polarization axes of the tested PCF is wavelength-dependent. The precision of the angle measurement was better than 0.3°.

show abstract

Development of an embedded instrument for autofocus and polarization alignment of polarization maintaining fiber

Cited by 2 publications

References 17 publications

Experimental Approach for Complex Optical Fiber Angular Orientation and Twist Measurement

Experimental Approach for Complex Optical Fiber Angular Orientation and Twist Measurement

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

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