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In the article a system for measuring the concentration of chlorophyll in methanol solution have been developed.
Microstructural waveguide co- doped with Yb3+/Tm3+ ions was used as a sensing element. The waveguide consisted of
thirty-seven glass capillaries arranged hexagonally was fabricated using the stacking and drawing method. Due to the
excitation of the active core by laser diode (λ=980nm), an effective energy transfer between Yb3+ and Tm3+ ions occurs.
As a result, two luminescence bands at 480 nm (1G4→3H6) and 650 nm (1G4→3F4) were obtained. Concentration of
chlorophyll methanol solution in the range from 2.75 to 13.66 [mh/dms] was measured. Linear dependence of the decrease of
luminescence intensity of thulium ions on its concentration was obtained. The sensitivity of the developed system was
0.005 [1/(mg/dm3)].
Karol Czajkowski,Marcin Kochanowicz,Jacek Zmojda,Joanna Szczykowska, andDominik Dorosz
"Structural waveguide co-doped with Yb3+/Tm3+ for measurement of chlorophyll concentration", Proc. SPIE 9290, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2014, 92900N (16 December 2014); https://doi.org/10.1117/12.2075712
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Karol Czajkowski, Marcin Kochanowicz, Jacek Zmojda, Joanna Szczykowska, Dominik Dorosz, "Structural waveguide co-doped with Yb3+/Tm3+ for measurement of
chlorophyll concentration," Proc. SPIE 9290, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2014, 92900N (16 December 2014); https://doi.org/10.1117/12.2075712