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1

Luminescent Polymer Optical Fibre Sensor for Temperature Measurement

100%

Miluski P., Dorosz D., Żmojda J., Kochanowicz M., Dorosz J.

Acta Physica Polonica A

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2015

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vol. 127

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issue 3

730-733

EN

In the paper the luminescence optical fiber used as a temperature sensor is presented. The new construction of rhodamine B doped, polymethyl methacrylate optical fibre with silver coating is shown. The fabrication process and luminescent properties of rhodamine B in sensing fibre are investigated. The attenuation and spectral shift of luminescence peak vs. the fibre length were measured and used for optimization of sensor construction. The characteristics of sensor for temperature range from 293 up to 343 K are shown. The relative sensitivity equal to -5.4× 10^{-4} K^{-1} was obtained. The article presents also the potential applications of presented sensor.

2

Tm^{3+}/Ho^{3+}-Doped ASE Fibre Source for Mid-Infrared Sensor Applications

100%

Dorosz D., Żmojda J., Kochanowicz M., Miluski P., Dorosz J.

Acta Physica Polonica A

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2012

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vol. 122

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issue 5

927-932

EN

The infrared emission of Tm^{3+}/Ho^{3+}-doped antimony-silicate optical fiber has been presented. Luminescence at 2.1 μm corresponding to ⁵I₇ → ⁵I₈ transition in holmium was obtained by energy transfer between Tm^{3+} and Ho^{3+} ions. According to the Förster-Dexter theory, the efficiency of energy transfer of the ³F_4 (Tm^{3+}) → ⁵I₇ (Ho^{3+}) transition was calculated. The optimization of the activator content and the donor (Tm^{3+})/acceptor (Ho^{3+}) ions concentration ratio were conducted with the purpose of maximizing the efficiency of energy transfer. It made possible to select best-suited glass which was used to manufacture double-clad optical fiber. Strong and narrow bands of amplified spontaneous emission which formed as a result of energy transfer between thulium and holmium ions were observed in the fiber under exciting with radiation at 795 nm wavelength.

3

White Upconversion in Yb^{3+}/Tm^{3+}/Ho^{3+} Co-Doped Antimony-Germanate Glasses

100%

Żmojda J., Dorosz D., Kochanowicz M., Miluski P., Dorosz J.

Acta Physica Polonica A

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2013

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vol. 124

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issue 3

598-601

EN

In the paper the spectroscopic properties of antimony-germanate glass co-doped with $Yb^{3+}/Ho^{3+}$ has been investigated. Fabricated $Yb^{3+}/Tm^{3+}/Ho^{3+}$ co-doped glass is characterised by the emission of simultaneous multicolour upconversion luminescence. Strong blue $^{1}G_{4} → ^{3}H_{6}(Tm^{3+})$, green $^{5}F_{4} → ^{5}I_{8}(Ho^{3+})$ and red $^{5}F_{5} → ^{5}I_{8}(Ho^{3+})$ upconversion emission bands have been measured under 976 nm excitation at room temperature. Influence of molar ratio of active ions and excitation power on the colour coordinates (CIE-1931) have been investigated.

4

Effect of Temperature on Upconversion Luminescence in Yb^{3+}/Tb^{3+} Co-Doped Germanate Glass

100%

Kochanowicz M., Dorosz D., Zmojda J., Miluski P., Dorosz J.

Acta Physica Polonica A

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2013

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vol. 124

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issue 3

471-473

EN

In the article effect of temperature on the cooperative energy transfer in germanate glass co-doped with $Yb^{3+}/Tb^{3+}$ under 976 nm laser diode pumping was investigated. The optimization of $Tb^{3+}$ concentration on the upconversion luminescence was determined. Strong luminescence at 489, 543, 586, 621 nm corresponding to $^{5}D_{4} → ^{7}F_{J}$ (J = 6,4,3) transitions and luminescence at 381, 415, 435 nm resulting from $^{5}D_{3}, ^{5}G_6 → ^{7}F_{J}$ (J=6,5,4) transitions were presented. The highest upconversion emission intensity was obtained in glass co-doped with $0.7Yb_{2}O_{3}/0.7Tb_{2}O_{3}$ (mol%). The effect of temperature on the luminescent properties of germanate glass in the range of 5-250°C indicates the presence of competing phenomena: an increase in the effective absorption cross-section of $Yb^{3+}$ ions donor as a function of temperature and migration of energy between pairs of ions $Yb^{3+}-Yb^{3+}$ and of multiphonon excitation levels $^{7}F_{J}$.

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4 Acta Physica Polonica A

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4 Dorosz D.

4 Dorosz J.

4 Kochanowicz M.

4 Miluski P.

3 Żmojda J.

1 Zmojda J.

Luminescent Polymer Optical Fibre Sensor for Temperature Measurement

Tm^{3+}/Ho^{3+}-Doped ASE Fibre Source for Mid-Infrared Sensor Applications

White Upconversion in Yb^{3+}/Tm^{3+}/Ho^{3+} Co-Doped Antimony-Germanate Glasses

Effect of Temperature on Upconversion Luminescence in Yb^{3+}/Tb^{3+} Co-Doped Germanate Glass