Measurement of the influence of dispersion on white-light interferometry

Pavlíček, Pavel; Soubusta, Jan

doi:10.1364/ao.43.000766

Cited by 63 publications

(28 citation statements)

References 11 publications

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“…The spatial resolution with extern forces inflicted on different positions along the sensing fiber is shown in Fig.7. The spatial resolving distances in the sensing system increase obviously with the position of extern forces, which achieves a good agreement with the Equation (17). According to the description in section 3, after inserting dispersive medium, the optical intensity of the interferogram can be expressed as: …”

Section: Methodssupporting

confidence: 64%

“…As a matter of fact, the propagation constant difference      is wavelength dependent, and this leads to the birefringence dispersion existing in PMFs 13,14,15 . The OPD generated in the birefrigent fiber can not compensated for all wavelengths using a nondispersive Michelson interferometer 16,17 . The white light interferograms are distorted.…”

Section: Influence Of the Birefringence Dispersion On Sensing Systemmentioning

confidence: 99%

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Influence of birefringence dispersion on a distributed stress sensor using birefringent optical fiber

Jing

Zhang

et al. 2009

Optical Fiber Technology

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Copies of full items can be used for personal research or study, educational, or not-for-profit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. A note on versions:The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP URL' above for details on accessing the published version and note that access may require a subscription. ABSTRACTDistributed stress sensor with a scanning Michelson white light interferometer can be used to detect stress distribution and its value by analyzing polarization mode coupling caused by stress field in PMFs (polarization maintaining fibers).In the measurement of polarization coupling, the birefringence in sensing fiber is usually considered to be wavelength-independent. The spatial resolution of the distributed stress sensor is invariable, when the optical source spectrum is given. In practical measurement, however, the birefringence in PMF is related with optical wavelength, the birefringence dispersion exists in PMF. Due to the birefringence dispersion, the spatial resolution of the distributed stress sensor descends obviously with the fiber length increasing. In this paper, the influence of external force position and optical source spectrum on spatial resolution in the distributed stress sensor is analyzed, while the birefringence dispersion is considered.

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Section: Methodssupporting

confidence: 64%

Section: Influence Of the Birefringence Dispersion On Sensing Systemmentioning

confidence: 99%

Influence of birefringence dispersion on a distributed stress sensor using birefringent optical fiber

Jing

Zhang

et al. 2009

Optical Fiber Technology

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“…The most important effects are the broadening of the interference pattern and the loss of contrast [7]. Therefore there is an effort to eliminate, or at least to minimize, dispersion in white-light interferometry.…”

Section: Influence Of Dispersionmentioning

confidence: 99%

Similarities and Differences between Spatial Coherence Profilometry and White-light Interferometry

Pavlíček¹,

Takeda²,

Rastogi³

et al. 2010

AIP Conference Proceedings

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“…However, when the medium under test is dispersive, envelopes of the interference fringes would expand rapidly, and the spatial resolution of the system seriously degrades [5]- [10], thus it is difficult to locate the position of the coherence envelopes. So far, two kinds of dispersion compensation methods have been mainly developed to mitigate or eliminate the influence of dispersion.…”

Section: Introductionmentioning

confidence: 99%

Spatial Resolution Enhancement Based on Peak Splitting in Low-Coherence Interferometry Signal

et al. 2016

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Low coherence interferometry (LCI) has been a useful tool to detect distributed polarization coupling (DPC) points in polarization maintaining fiber (PMF). However, due to birefringence dispersion, two close coupling points in long PMF are usually difficult to be distinguished. A novel method in our paper has been presented to tackle the problem. When the product of birefringence dispersion and fiber length called accumulated dispersion (AD) is numerically enough, the coherence envelopes caused by two close coupling points will split into periodic multiple peaks in the overlapping region and the distance of the two coupling points can be further demodulated from the frequency of splitting peaks. An experimental setup based on LCI has been established with two Panda PMFs of 600m and 950m under test. Experimental results show that the measuring errors of two close coupling points distance were less than 5%. When AD reached as high as 29 fs/nm and 46 fs/nm, the spatial resolution was increased by 13-fold and 20-fold, respectively. The constraint conditions to ensure the appearance of peak splitting is also discussed. It indicates that our method may show a potential application of spatial resolution enhancement in high-dispersive LCI without dispersion compensation.

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Measurement of the influence of dispersion on white-light interferometry

Cited by 63 publications

References 11 publications

Influence of birefringence dispersion on a distributed stress sensor using birefringent optical fiber

Influence of birefringence dispersion on a distributed stress sensor using birefringent optical fiber

Similarities and Differences between Spatial Coherence Profilometry and White-light Interferometry

Spatial Resolution Enhancement Based on Peak Splitting in Low-Coherence Interferometry Signal

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