Optical properties of cerium-codoped high power laser fibers

Unger, Sonja; Schwuchow, Anka; Jetschke, Sylvia; Grimm, Stephan; Scheffel, A.; Kirchhof, J.

doi:10.1117/12.2002399

Cited by 16 publications

(11 citation statements)

References 16 publications

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“…The 0.1 Al + 0.005 Ce sample shows an absorbance peak at 310 nm due to Ce 3+ consistent with literature …”

Section: Absorbancesupporting

confidence: 89%

“…The absorbance peak of Ce at 310 nm can clearly be identified as Ce 3+ . The combination of Ce and Al forces reducing conditions during fabrication suppressing the formation of Ce 4+ . Under oxidizing fabrication conditions Ce 4+ results in a peak at 260 nm .…”

Section: Discussionmentioning

confidence: 99%

“…The combination of Ce and Al forces reducing conditions during fabrication suppressing the formation of Ce 4+ . Under oxidizing fabrication conditions Ce 4+ results in a peak at 260 nm . Ce showed consistently intense luminescence signals in response to each of the measurements because its transition are in the transmission window of the detectors used.…”

Section: Discussionmentioning

confidence: 99%

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Luminescence effects in reactive powder sintered silica glasses for radiation sensing

et al. 2018

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Silica glasses doped with rare-earth ions are potential materials for optical fiber radiation detection and dosimetry applications. High sensitivity to radiation requires fibers with large cores that can be reliably fabricated using glass made in a novel process from the reactive powder sintering of silica. The luminescence and dosimetric properties of a range of rare earth-doped silica materials produced using this novel technique are reported here. Radioluminescence and optically stimulated luminescence (OSL) are the fundamental mechanisms enabling radiation detection in optical fibers. It was found that thermoluminescence, radioluminescence, and OSL are observed if the glass contains luminescent transitions in the detection wavelength range. Cerium-and thulium-doped silica glasses were found to be promising candidates for optical fiber dosimetry. Samples showed intense luminescence signals in response to both photo-stimulation and irradiation from alpha and beta sources. OSL results for cerium are three times larger than results for irradiated fluoride phosphate glasses previously tested for dosimetry use. Spectroscopic measurements indicate emission in the 300-500 nm region, suitable for detection with photomultiplier tubes. K E Y W O R D Sluminescence, sensors, fibers

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“…The 0.1 Al + 0.005 Ce sample shows an absorbance peak at 310 nm due to Ce 3+ consistent with literature …”

Section: Absorbancesupporting

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Luminescence effects in reactive powder sintered silica glasses for radiation sensing

et al. 2018

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“…Engholm et al [ 18 ] have reported on Ce co-doping and improved PD hardening in Yb-based optical fiber lasers. Likewise, Kirchhoff’s group [ 19 ] has studied the optical properties of Ce-doped silica multicomponent optical fibers for high power lasers. Furthermore, Ce-doped silica glasses are the subject of investigation for ionizing radiation dosimetry based on the Ce 3+ ions luminescence properties [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Incorporation of Cerium Ions in MCVD-Silica Glass Preforms for Remote Optical Fiber Radiation Dosimetry

Cieslikiewicz-Bouet

Hamzaoui

Ouerdane

et al. 2021

Sensors

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The incorporation of Ce3+ ions in silicate glasses is a crucial issue for luminescence-based sensing applications. In this article, we report on silica glass preforms doped with cerium ions fabricated by modified chemical vapor deposition (MCVD) under different atmospheres in order to favor the Ce3+ oxidation state. Structural analysis and photophysical investigations are performed on the obtained glass rods. The preform fabricated under reducing atmosphere presents the highest photoluminescence (PL) quantum yield (QY). This preform drawn into a 125 µm-optical fiber, with a Ce-doped core diameter of about 40 µm, is characterized to confirm the presence of Ce3+ ions inside this optical fiber core. The fiber is then tested in an all-fibered X-ray dosimeter configuration. We demonstrate that this fiber allows the remote monitoring of the X-ray dose rate (flux) through a radioluminescence (RL) signal generated around 460 nm. The response dependence of RL versus dose rate exhibits a linear behavior over five decades, at least from 330 µGy(SiO2)/s up to 22.6 Gy(SiO2)/s. These results attest the potentialities of the MCVD-made Ce-doped material, obtained under reducing atmosphere, for real-time remote ionizing radiation dosimetry.

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“…The slightly larger temperature step of the Ce co-doped fiber cannot be explained by this effect and must have another origin, since the absorption cross section is not influenced by Ce codoping. 25 …”

Section: Temperature Evolution In Differently Doped Fibersmentioning

confidence: 99%

Length distributed measurement of temperature effects in Yb-doped fibers during pumping

et al. 2014

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Abstract. We demonstrate a distributed measurement technique to observe temperature changes along pumped Yb-doped fibers. This technique is based on an array of fiber Bragg gratings acting as a temperature sensor line. The Bragg gratings are inscribed directly into the Yb-doped fiber core using high-intensity ultrashort laser pulses and an interferometric setup. We studied the temperature evolution in differently co-doped Yb fibers during optical pumping and identified different effects contributing to the observed temperature increase. We found that preloading of fibers with hydrogen supports the formation of Yb 2þ during UV irradiation and has a large impact on fiber temperature during pumping. The proposed technique can be applied to investigate the homogeneity of pump absorption in active fibers and to support spatially resolved photodarkening measurements. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Optical properties of cerium-codoped high power laser fibers

Cited by 16 publications

References 16 publications

Luminescence effects in reactive powder sintered silica glasses for radiation sensing

Luminescence effects in reactive powder sintered silica glasses for radiation sensing

Investigation of the Incorporation of Cerium Ions in MCVD-Silica Glass Preforms for Remote Optical Fiber Radiation Dosimetry

Length distributed measurement of temperature effects in Yb-doped fibers during pumping

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