Phase delay of polarisation modes in elastically twisted spun fibres

Morshnev, S. K.; Chamorovsky, Yury K; Vorob'ev, Igor' L

doi:10.1070/qe2011v041n05abeh014555

Cited by 5 publications

(1 citation statement)

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“…Twisting the SHBF results in the variation of the phase delay between elliptically-polarized modes, which is manifested in the shift of the spectral interference fringes. The effect of varying the phase delay between the polarization modes in the SHBF under elastic twist was studied in [37]. The periodic twist-induced changes of the output intensity measured for a single wavelength were used to calculate the linear beat length of the SHBF.…”

Section: Introductionmentioning

confidence: 99%

Polarimetric Sensitivity to Torsion in Spun Highly Birefringent Fibers

Kowal

Statkiewicz-Barabach

Bernas

et al. 2019

Sensors

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We report on experimental studies of polarimetric sensitivity to torsion in spun highly birefringent fibers. Two classes of spun fibers were examined, namely spun side-hole fibers and birefringent microstructured fibers with different birefringence dispersion, spin pitches, and spin directions. The polarimetric sensitivity to torsion was determined by monitoring a displacement of the spectral interference fringes arising in the output signal because of interference of polarization modes and induced by an additional fiber twist. Both the experimental results and the analytical predictions showed that the sensitivity to torsion normalized to the fringe width in the spun highly birefringent fibers increased asymptotically with the twist rate to the value of 1/ π rad−1. We have also studied the polarimetric response to temperature in the spun side-hole fibers. We have found that, in contrast to the torsional sensitivity, the temperature sensitivity decays asymptotically to zero with increasing fiber twist rate. Therefore, the spun fibers with short spin pitches are especially well suited for torsion measurements because the torsional sensitivity and the range of linear response are both enhanced in such fibers, while at the same time, the cross-sensitivity to temperature is reduced.

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Section: Introductionmentioning

confidence: 99%