2003
DOI: 10.1117/12.504537
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Transverse birefringence in polymer optical fiber introduced in drawing process

Abstract: In this work, we investigated the transverse birefringence in PMMA-based polymer optical fibre introduced in the drawing process. We proposed a simple theoretical model that attributes the induced transverse birefringence to three major factors: quenching effect, molecular alignment, and thermal expansion mismatch. Various experiments have been designed and performed to ascertain and identify the individual contribution of the three factors. In our experiments, polymer optical fibres are drawn under varying co… Show more

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Cited by 9 publications
(7 citation statements)
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“…Since the polymer chains in POF are highly oriented in the axial direction, such anisotropic thermal expansion can also even be expected in the annealed POFs [17], which is implied by the better linearity in the measured temperature responses of POFBGs than that in those calculated. Removal of the thermal expansion contribution to the POFBG wavelength response will lead to a good linearity and larger sensitivity.…”
Section: Thermo-optic Effect Of Pmma Based Optical Fibermentioning
confidence: 94%
See 1 more Smart Citation
“…Since the polymer chains in POF are highly oriented in the axial direction, such anisotropic thermal expansion can also even be expected in the annealed POFs [17], which is implied by the better linearity in the measured temperature responses of POFBGs than that in those calculated. Removal of the thermal expansion contribution to the POFBG wavelength response will lead to a good linearity and larger sensitivity.…”
Section: Thermo-optic Effect Of Pmma Based Optical Fibermentioning
confidence: 94%
“…Due to the large draw ratio in PMMA based optical fiber (>6000) [17], θ is very small and f close to one. Furthermore, the orientation function can be expressed by the thermal expansion coefficients,…”
Section: Anisotropic Thermal Expansion Of Pmma Based Optical Fibermentioning
confidence: 99%
“…This will orient the polymer molecules along the drawing (axial) direction. This gives rise to optical anisotropy of the fiber in the form of transverse birefringence [18] and mechanical anisotropy in the form of volume expansion [19]. The stress related anisotropy may vary with environmental conditions, leading to varying sensitivity of a POFBG sensor.…”
Section: Pofbg Responses and Expressionmentioning
confidence: 99%
“…Nevertheless, LRSPR based sensor has relative low sensitivity due to its utilization of evanescent wave for several reasons [5]. And production process of PFBG based sensor is a bit complicated [6]. First of all, the photosensitive optical fiber (POF) should be fabricated by a two-step process:…”
Section: Introductionmentioning
confidence: 99%