Residual stress profiles in optical fibers determined by the two-waveplate-compensator method

Montarou, Carole C.; Gaylord, Thomas K.; Dachevski, Alexei I.

doi:10.1016/j.optcom.2006.02.046

Cited by 18 publications

(7 citation statements)

References 17 publications

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“…1 suggests that the core index decreases with the number of scanning cycles, which is consistent with the reported results [5]- [7], [12]- [14]. It is known that the manufacturing process of a conventional telecommunication SMF usually leaves a fairly large compressive stress in the core of the fiber and a small tensile stress in the cladding area close to the core [28]. When the fiber is irradiated with CO 2 -laser pulses, the stress in the core is relaxed by the intense heating effect, which results in a decrease in the refractive index of the core at the point of irradiation [12], [13].…”

Section: Lpfg Written In Conventional Smfsupporting

confidence: 88%

Recent development on CO 2 -laser written long-period fiber gratings

Liu

Chiang

2008

Passive Components and Fiber-Based Devices V

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The paper reviews the recent progress on CO 2 -laser writing of long-period fiber gratings (LPFGs) in different kinds of fibers, including conventional single-mode fiber (SMF), boron-doped SMF, polarization-maintaining fiber, photonic crystal fiber, and polarization-maintaining photonic crystal fiber. In particular, we report the writing dynamics for the understanding of the physical mechanisms involved in the writing process and show that the CO 2 -laser pulses can not only relax the internal stress in the fiber core but also induce a frozen-in stress in the cladding of the fiber under tension. The applications of CO 2 -laser written LPFGs, especially for the realization of broadband optical couplers, are also discussed.

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Section: Lpfg Written In Conventional Smfsupporting

confidence: 88%

Recent development on CO 2 -laser written long-period fiber gratings

Liu

Chiang

2008

Passive Components and Fiber-Based Devices V

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“…In a fiber with an azimuthally symmetric axial stress distribution, a single radial profile fully characterizes the stress. In this case, the axial stress profile can be calculated from the inverse Abel transform of a retardation measurement [15][16][17][18][19][20]. For fibers with azimuthally asymmetric axial stress distributions, a full cross-sectional distribution is required to characterize the stress.…”

Section: Introductionmentioning

confidence: 99%

Accurate cross-sectional stress profiling of optical fibers

2009

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A novel technique for determining two-dimensional, cross-sectional stress distributions in optical fibers and fiber-based devices is presented. Use of the Brace-Köhler compensator technique and a polarization microscope for the measurement of retardation due to stress-induced birefringence is described, along with the tomographic reconstruction process for the determination of stress. Measurements are performed on Corning SMF-28 fiber in an unperturbed section, a section near a cleaved end-face, and a section exposed to CO2 laser radiation. Cross-sectional stress distributions are presented. Stress relaxation is quantified in the cleaved fiber and the fiber exposed to CO2 laser radiation.

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“…Both use Fourier theory. In the first algorithm we expand R(y) in Fourier series and compute the inverse Abel transform to obtain C(r) based on [10]. For the second algorithm, we propose to expand the expected result C(r) in Fourier series and compute the forward Abel transform to obtain the measured retardance [11].…”

Section: Inverse Abel Transform Algorithms To Determine the Radial Profile Of The Photoelastic Coefficient Of Glass Optical Fibers 1 Intrmentioning

confidence: 99%

Inverse Abel transform algorithms to determine the radial profile of the photoelastic coefficient of glass optical fibers

et al. 2016

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We compare two algorithms to determine the radial profile of the photoelastic coefficient C in glass optical fibers. We first measure the retardance profile of a transversally illuminated fiber as a function of tensile load. The radial profile C(r) is obtained from the inverse Abel transform of this retardance profile. Our first algorithm expands the measured retardance in its Fourier coefficients before computing the inverse Abel transform. With the second algorithm the expected result of the inverse Abel transform is expanded and the forward Abel transform of that expansion is compared to the measured retardance. We apply both approaches on the retardance measurement of commercially available single mode and multi-mode fibers.

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Residual stress profiles in optical fibers determined by the two-waveplate-compensator method

Cited by 18 publications

References 17 publications

Recent development on CO 2 -laser written long-period fiber gratings

Recent development on CO 2 -laser written long-period fiber gratings

Accurate cross-sectional stress profiling of optical fibers

Inverse Abel transform algorithms to determine the radial profile of the photoelastic coefficient of glass optical fibers

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