High concentration Yb-Er co-doped phosphate glass for optical fiber amplification

Abstract:In recent years, the exploitation of compact laser sources and amplifiers in fiber form has found extensive applications in industrial and scientific fields. The fiber format offers compactness, high beam quality through single-mode regime and excellent heat dissipation, thus leading to high laser reliability and long-term stability. The realization of devices based on this technology requires an active medium with high optical gain over a short length to increase efficiency while mitigating nonlinear optical effects. Multicomponent phosphate glasses meet these requirements thanks to the high solubility of rare-earth ions in their glass matrix, alongside with high emission cross-sections, chemical stability and high optical damage threshold. In this paper, we review recent advances in the field thanks to the combination of highly-doped phosphate glasses and innovative fiber drawing techniques. We also present the main performance achievements and outlook both in continuous wave (CW) and pulsed mode regimes.Keywords: fiber laser and amplifier; phosphate fiber; all-fiber master oscillator power amplifier (MOPA); rare-earth-doped fiber

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“…Core-pumped and cladding-pumped amplifiers were demonstrated, reaching gains p.u.l. of 4.0 and 2.3 dB/cm, respectively [57].…”

Section: Er and Yb/er Co-doped Phosphate Fiber Lasers And Amplifiersmentioning

confidence: 99%

Highly Doped Phosphate Glass Fibers for Compact Lasers and Amplifiers: A Review

et al. 2017

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“…Besides, phosphate glasses allow high rare earth (RE) ions solubility. Thus, quenching phenomenon does only occur at very high concentrations of RE ions [20,21]. Due to these properties, phosphate glasses have recently become appealing for optical communications [22] and laser sources as well as optical amplifiers [20,21,[23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Effect of the addition of Al2O3, TiO2 and ZnO on the thermal, structural and luminescence properties of Er3+-doped phosphate glasses

Lopez-Iscoa

Petit

Massera

et al. 2017

Journal of Non-Crystalline Solids

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Er-doped phosphate glasses were fabricated by melt-quenching technique. The changes in their thermal, structural and luminescence properties with the addition of Al2O3, TiO2 or ZnO were studied.Physical and thermal properties were investigated through density measurement and differential thermal analysis. Structural characterization was performed using the Raman and Infrared spectroscopy. In order to study the influence of the composition on the luminescence properties of the glasses, the refractive index, the luminescence spectra and the lifetime values were measured.The results show that with the addition of Al2O3 and TiO2 the phosphate network becomes more connected increasing the glass transition temperature, whereas the addition of ZnO does not show 2 significant changes in the optical, thermal and structural properties but it leads to a larger emission cross-section at 1540 nm as compared to the other glasses. As the site of the Er 3+ is not strongly affected by the change in the glass composition, we think that the emission properties of the glasses depend on the glass structure connectivity, which has an impact on the Er 3+ ions solubility.

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“…15 Apart from their biological properties, phosphate glasses are also of great interest due to their easy processing, excellent thermo-mechanical and chemical properties, homogeneity, good thermal stability, and excellent optical properties, such as high transparency in the UV-Visible-Near-Infrared (UV-Vis-NIR) region. 20,21 In addition, phosphate glasses with P 2 O 5 higher than 45 mol% have proven to be easily drawable into optical fibers. Thus, concentration quenching phenomena do only occur at very high concentrations of RE.…”

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confidence: 99%

“…Thus, concentration quenching phenomena do only occur at very high concentrations of RE. 14,20,21,28,29 However, to the best of our knowledge, only few studies focusing on glass compositions that combine both biocompatibility and suitable optical properties have been reported up to now. 9,[22][23][24][25][26] Therefore, phosphate glasses have recently become appealing for the engineering of photonic devices for optical communications, 27 laser sources, and optical amplifiers.…”

mentioning

confidence: 99%

“…9,[22][23][24][25][26] Therefore, phosphate glasses have recently become appealing for the engineering of photonic devices for optical communications, 27 laser sources, and optical amplifiers. 14,20,21,28,29 However, to the best of our knowledge, only few studies focusing on glass compositions that combine both biocompatibility and suitable optical properties have been reported up to now. 24,30 Recently, optical fibers have gained a lot of interest for use in biomedical applications such as phototherapy, optogenetics, biological sensing, and imaging.…”

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Design, processing, and characterization of an optical core‐bioactive clad phosphate fiber for biomedical applications

et al. 2019

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The aim of this study was to fabricate a bioactive optical fiber able to monitor “in situ” its reaction with the body through changes in its optical properties. Core and cladding preforms were prepared with the composition (97.25*(0.50P2O5‐0.40SrO‐0.10Na2O)‐2.5ZnO‐0.25Er2O3) and (98.25*(0.50P2O5‐0.40SrO‐0.10Na2O)‐1.75ZnO) (in mol%), respectively, and successfully drawn into a multimode core/clad optical fiber. Optical and near‐Infrared images assessed the proper light guiding properties of the fiber. The fibers favor the precipitation of a Ca‐P reactive layer at its surface concomitant with a reduction in the fiber diameter, when immersed in SBF, often assigned as a sign of bioactivity. It is clearly shown here that the bio‐response of the fiber upon immersion in SBF can be tracked from the decrease in the intensity of the Er3+ ions emission at 1.5 µm. This confirms that the newly developed optical fiber, which combines good optical properties with a suitable bioactive behavior, is a promising platform for the development of novel biomedical devices for biophotonic and photomedical applications. Finally, the successful splicing of the newly developed fiber with commercial optical fibers was an evidence of the possibility to integrate the newly developed phosphate fiber within existing components used in the field of biomedicine.

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High concentration Yb-Er co-doped phosphate glass for optical fiber amplification

Cited by 37 publications

References 33 publications

Highly Doped Phosphate Glass Fibers for Compact Lasers and Amplifiers: A Review

Highly Doped Phosphate Glass Fibers for Compact Lasers and Amplifiers: A Review

Effect of the addition of Al2O3, TiO2 and ZnO on the thermal, structural and luminescence properties of Er3+-doped phosphate glasses

Design, processing, and characterization of an optical core‐bioactive clad phosphate fiber for biomedical applications

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