Zjawiska piezooptyczne i elastooptyczne w fotonicznych kompozytach polimerowych

• Autorzy: Lesiak P.

Warianty tytułu

EN

Piezooptic and elastooptic phenomena in photonic polymer composites

• Języki publikacji: PL

Abstrakty

PL

W pracy przedstawiono zwięzłą analizę zarówno numeryczną, jak i eksperymentalną, zjawisk piezooptycznych i elastooptycznych w fotonicznych kompozytach polimerowych. Do analizy wymienionych zjawisk użyto mikrostrukturalnych światłowodów polimerowych, co w bardzo przejrzysty sposób uwidoczniło odkształcenia, jakie pojawiają się w kompozycie polimerowym w momencie laminacji. Eksperyment ten ułatwił w znacznym stopniu analizę numeryczna wpływu jaki wywiera na dowolny światłowód skurcz polimeryzacyjny oraz umożliwił ocenę stopnia wpływu zjawiska elastooptycznego na mikrostrukturalny światłowód polimerowy, a przez to rozróżnienie go od zjawiska piezooptycznego. Przeprowadzona analiza otrzymanych wyników wykazała, że znaczenie ma takie orientacja głównych osi światłowodu względem włókien zbrojenia. W zależności od orientacji światłowodu w fo-tonicznym kompozycie polimerowym, zjawiska piezooptyczne lub elastooptyczne mogą wzmocnić lub osłabić wpływ skurczu polimeryzacyjnego. Dodatkowo istnieje możliwość zmiany charakterystyki włókna światłowodowego- wzmocnienie lub osłabienie czułości światłowodu na wybrany czynnik zewnętrzny. W pracy wykazano również, że wpływ temperatury na zmianę naprężeń we włóknie światłowodowym ma swoje główne źródło w zjawisku zwanym rozszerzalnością, cieplną i dotyczy głównie deformacji kompozytu polimerowego. Analizowane problemy związane z laminacją, włókien światłowodowych mogą zostać rozwiązane poprzez zastosowanie miękkiej warstwy lakieru pokrywającego światłowód. Zebrana wiedza została wykorzystana do zaprojektowania hybrydowego czujnika światłowodowego do równoczesnego pomiaru naprężeń i temperatury w kompozycie polimerowym.

EN

In this work, both numerical and experimental results of piezooptic and elastooptic phenomena in photonic polymer composites are presented. This new material consists of a polymer composite and a polymer highly birefringent (HB) microstructured fiber. The polymer fiber can easily reveal deformations occurring in the material during the lamination process. The experimental results obtained can facilitate and separate the numerical analysis of both piezooptic and elastooptic phenomena. Additionally, this work shows that thermal expansion of the composite material is the main reason for the observed changes in stress distribution within the optical fiber during the heating process. Furthermore. the piezooptic and elastooptic phenomena in the optical fibers strongly depend on the angular orientation of the fiber within the composite material. Depending on the orientation of the fiber, stress sensitivity can be either increased or decreased under external perturbation. Polymer HB microstructured fibers embedded in the composite material should be surrounded by an additional soft buffer coating. This additional coating of optical fibers can absorb all adverse stress that appears during the manufacturing process of phot nic polymer composites. The numerical calculations and experimental results presented in this work give the possibility to create a new hybrid sensor by combining two types or polarimetric sensors that are based on a side-hole fiber and an HB photonic crystal fiber (PCF). Both sensors are strain sensitive but only one of them (HB PCF) is temperature insensitive. This combination gives us the possibility to measure strain independently from ambient temperature. The proposed hybrid configuration can be effectively used for more reliable strain and temperature measurements and can be implemented in a wide range of sensing applications.

Słowa kluczowe

PL

polaryzacja; dwójłomność; zjawisko piezooptyczne; zjawisko elastooptyczne; kompozyt polimerowy

EN

birefringence; polarization; piezooptic phenomena; elastooptic phenomena; polymeric composite

• Wydawca: Oficyna Wydawnicza Politechniki Warszawskiej
• Czasopismo: Prace Naukowe Politechniki Warszawskiej. Fizyka
• Rocznik: 2014
• Tom: z. 57
• Strony: 3--105
• Opis fizyczny: Bibliogr. 111 poz., rys., tab., wykr.

Twórcy

autor

Lesiak P.

• Wydział Fizyki Politechniki Warszawskiej

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