Erbium–bismuth-doped germanium silicate active optic glass for broad-band optical amplification

Šmejcký, J.; Jeřábek, V.; Mareš, D.; Voves, J.; Vařák, Petr; Cajzl, Jakub; Oswald, J.; Prajzler, Václav; Nekvindová, Pavla

doi:10.1016/j.optmat.2023.113621

Cited by 11 publications

(6 citation statements)

References 33 publications

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“…Because of non-radiative (NR) transitions, Er 3+ ions rapidly de-excite to the levels 2 F 5/2 causes 452 nm blue emission, ( 2 H+ 4 G) 11/2 causes 521 nm green and 4 S 3/2 level 545 nm green emission, and 4 F 9/2 level to ground 4 I 15/2 causes 652 nm red emission through NR. Thereafter, NR transitions led the Er 3+ ions to de-excite from 4 F 9/2 level to 4 I 13/2 and then 1531 nm emission may be expected when the ions further de-excite for 4 I 13/2 → 4 I 15/2 from 378 nm excitation wavelength. On the other hand, secondly, 980 nm ground state absorption (GSA) excites the Er 3+ ions to the 4 I 11/2 (10204 cm −1 ), however this energy was utilized for energy transfer upconversion (ETU1) to excite to the level 4 S 3/2 .…”

Section: Resultsmentioning

confidence: 99%

“…Bismuth borate glasses (BBG) are suitable for use in lasers, 1,2 optical fibers, 3,4 lenses, and other optical components because of their high refractive index and good optical transparency in the visible and near-infrared (NIR) emission of the electromagnetic spectrum. BBGs are also being explored for laser applications due to their high nonlinear optical properties, 5 which make them appealing for frequency conversion and amplification of laser pulses.…”

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confidence: 99%

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Erbium-Ion-Doped Bismuth Borate Glasses for High Optical Gain NIR Fiber Laser Applications

Prasanth,

Ravi,

Thyagarajan

2024

ECS J. Solid State Sci. Technol.

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The study focused on investigating the thermal, structural, and luminescent properties of bismuth borate glasses doped with erbium (Er3+) ions and modified with Gd2O3, K2O, and Li2O (BBGKL: Erx) aiming for fiber lasers. Two glass transition temperatures were observed at 381 (Tg1) and 471 K (Tg2) for BBGKL glass. O1s de-convolution spectrum bridging oxygens for BBGKL glass, including B-O, Bi-O, Li2O, and K2O, were discovered by X-ray photoelectron spectroscopy. Both the photoluminescence 4I13/2→4I15/2 NIR and the absorption bands from the UV-visible-near infrared (NIR) spectrum were found to occur at 1531 nm for BBGKL: Er. Luminescence quenching was not noticed up to 3.0 mol% of Er3+ ion concentration. The BBGKL: Er0.5 glass has a remarkable connection between its absorbance and emission cross-sections of 0.77 and 0.82 x 10-20 cm2, respectively. The longest lifetime of green emission for the 4S3/2→4I15/2 transition was found for BBGKL: Er2.0 glass at 10.6 µs and 1531 nm NIR emission for the 4I13/2→4I15/2 transition of BBGKL: Er0.5 glass was 0.77 ms. In the 1413-1728 nm NIR band region for BBGKL:Er3.0, high-optical-gain cross-section G(λ) was promising for the population inversion at γ=0.6. These findings suggest that the BBGKL: Er0.5 glass would prove helpful in NIR fiber laser applications

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

Erbium-Ion-Doped Bismuth Borate Glasses for High Optical Gain NIR Fiber Laser Applications

Prasanth,

Ravi,

Thyagarajan

2024

ECS J. Solid State Sci. Technol.

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“…The PL peak exhibited a full width at half maximum (FWHM) of ≈70 nm; this was broader than the emission of Er 3+ ions in some inorganic hosts. For instance, the FWHM of Er 3+ ions in germanium silicate glass, phosphosilicate glass, and Al₂O₃ were ≈20, 30, and 52 nm, [ 7,30,31 ] respectively. This broadening was due to the coupling of the f‐f electronic transitions of the Er 3+ ions with the vibrational modes of the organic valence bonds.…”

Section: Experiments and Analysismentioning

confidence: 99%

Demonstration of Optical Gain at 1535 nm Based on Er^III Complex‐Doped Polymer Waveguides Under Light‐Emitting Diode Excitation

He,

Man,

Shi

et al. 2024

Advanced Optical Materials

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A near‐infrared luminescent complex Er(DBTTA)3(DBFDPO) [where DBTTA = dibenzotetrathienoacene; DBFDPO = 4,6‐bis (diphenylphosphoryl) dibenzofuran] is synthesized. Based on the intramolecular energy transfer between organic ligands and Er3+ ions, optical gains at 1535 nm are demonstrated in Er(DBTTA)3(DBFDPO)‐doped polymer waveguides under the excitation of light‐emitting diodes (LEDs) instead of laser pumping. Relative gains of 6.4, 8.2, and 10.6 dB are obtained in 1 cm long waveguides with cross‐sectional dimensions of 6 × 4, 4 × 4, and 2 × 3 µm2 respectively, using the vertical top‐pumping mode of a 365 nm LED with 462 mW. Incorporating an ≈100 nm thick aluminum reflector grown under the lower cladding, enhanced the optical gain to 11.6 dB cm−1 in a waveguide with a cross‐section of 4 × 4 µm2, and an internal gain of ≈7.4 dB cm−1 is achieved. By relying on the intramolecular energy transfer and LED top‐pumping technology, the upconversion luminescence of Er3+ ions and thermal damage to polymer waveguides caused by the high power density of laser pumping can be effectively reduced. The complex Er(DBTTA)3(DBFDPO)‐doped polymer can be spin‐coated on different types of waveguides to compensate for optical losses at 1.5 µm and is expected to have a critical role in planar photonic integration.

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“…Erbium-doped semiconductors are crucial in the development of optoelectronic devices such as optical amplifiers, lasers, and fiber optic communications systems [24][25][26]. By understanding how erbium concentration affects the structural and optical properties of sodium silicate, researchers can optimize the performance of these devices for improved efficiency and reliability [26,27]. Moreover, sodium silicate is a versatile material widely used in various industries including coatings, adhesives, and ceramics [20,28].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Optical Properties of Erbium-Doped Sodium Silicate in Sol-Gel Matrix

Mansour,

Abou Hammad,

El Nahrawy

2024

Silicon

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In this study, we investigated how the concentration of erbium (0.0, 1, 2 mol% Er) affects the structural and optical properties of thin films made from sol-gel sodium silicate doped with erbium nitrate, thermally treated at 250 °C. Through systematic investigation, we explore the structural evolution and optical behavior of the thin films across varying Er3+ concentrations. The sol-gel demonstrated effective capabilities for substantial concentrations of Er3+ oxides through doping at lower calcination temperatures. The spectroscopic characteristics were studied using visible-near infrared spectroscopy (UV–vis–NIR), transmission electron microscopy, and Fourier transform infrared spectroscopy. Increasing the Er ratio decreased both the transmission and the energy band gap (3.6–3.34 eV) of the films while the absorption peak increased. The obtained results suggest that Er3+ activators demonstrate advantageous optical properties in the evaluated sodium silicate glass matrix. With the introduction of Er, optical transmittance ranges from 85 to 55% in the visible and near-infrared (NIR) regions, highlighting their advantageous characteristics. This research contributes to advancing the understanding of erbium-doped thin films for potential applications in optoelectronic devices and photonics.

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Erbium–bismuth-doped germanium silicate active optic glass for broad-band optical amplification

Cited by 11 publications

References 33 publications

Erbium-Ion-Doped Bismuth Borate Glasses for High Optical Gain NIR Fiber Laser Applications

Erbium-Ion-Doped Bismuth Borate Glasses for High Optical Gain NIR Fiber Laser Applications

Demonstration of Optical Gain at 1535 nm Based on Er^III Complex‐Doped Polymer Waveguides Under Light‐Emitting Diode Excitation

Synthesis and Optical Properties of Erbium-Doped Sodium Silicate in Sol-Gel Matrix

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Erbium–bismuth-doped germanium silicate active optic glass for broad-band optical amplification

Cited by 11 publications

References 33 publications

Erbium-Ion-Doped Bismuth Borate Glasses for High Optical Gain NIR Fiber Laser Applications

Erbium-Ion-Doped Bismuth Borate Glasses for High Optical Gain NIR Fiber Laser Applications

Demonstration of Optical Gain at 1535 nm Based on ErIII Complex‐Doped Polymer Waveguides Under Light‐Emitting Diode Excitation

Synthesis and Optical Properties of Erbium-Doped Sodium Silicate in Sol-Gel Matrix

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Demonstration of Optical Gain at 1535 nm Based on Er^III Complex‐Doped Polymer Waveguides Under Light‐Emitting Diode Excitation