Enhanced <scp>NIR</scp> photoemission from Bi‐doped aluminoborate glasses via topological tailoring of glass structure

Cao, Jiangkun; Xue, Yan; Peng, J.; Li, Xin; Huang, M.N.; Xu, Sheng; Yang, Zhongmin; Peng, Mingying

doi:10.1111/jace.16084

Cited by 14 publications

(15 citation statements)

References 49 publications

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“…Unfortunately, single invisible fluorescence emissions of Eu 2+ , Mn 2+ , and Fe 3+ ions are hard to acquire, and their emissions FWHM are insufficient ( Berezovskaya et al., 2013 ; Song et al., 2015 ; Zhou et al., 2020 ). Although Ni 2+ and Bi ion-activated crystal or glass materials usually exhibit an ultra-broadband emission in the second NIR window (NIR-II, 1000-1700 nm), their luminous efficiency is disappointed ( Cao et al., 2018 ; Xiong et al., 2020 ). On the contrary, Cr 3+ ion has been considered as an ideal NIR luminescence center in view of its high quantum efficiency and tunable emission spectrum in 650-1600 nm which strongly depends on the crystal field strength ( Bai et al., 2018 ).…”

Section: Introductionmentioning

confidence: 99%

Li/Na substitution and Yb3+ co-doping enabling tunable near-infrared emission in LiIn2SbO6:Cr3+ phosphors for light-emitting diodes

Liu

Мolokeev

et al. 2021

iScience

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Summary Near-infrared (NIR) phosphor-converted light-emitting diode (pc-LED) has great potential in non-invasive detection, while the discovery of tunable broadband NIR phosphor still remains a challenge. Here, we report that Cr 3+ -activated LiIn 2 SbO 6 exhibits a broad emission band ranging from 780 to 1400 nm with a full width at half maximum (FWHM) of 225 nm upon 492 nm excitation. The emission peaks are tuned from 970 to 1020 nm together with considerable broadening of FWHM (∼285 nm) via Li/Na substitution. Depending on Yb 3+ co-doping, a stronger NIR fluorescence peak of Yb 3+ appears with improved thermal resistance, which is ascribed to efficient energy transfer from Cr 3+ to Yb 3+ . An NIR pc-LED package has been finally designed and demonstrated a remarkable ability to penetrate pork tissues (∼2 cm) so that the insertion depth of a needle can be observed, indicating that the phosphor can be applied in non-destructive monitoring.

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Section: Introductionmentioning

confidence: 99%

Li/Na substitution and Yb3+ co-doping enabling tunable near-infrared emission in LiIn2SbO6:Cr3+ phosphors for light-emitting diodes

Liu

Мolokeev

et al. 2021

iScience

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“…The band from 520 cm −1 can be attributed 4,35 Besides, the bands from 828 to 933 cm −1 may be originated from the anti-symmetric stretching vibration of Ge-O-Ge. 4,20,53 With introducing fluoride into this glass, no obvious variation is observed in these bands, indicating that no transformation happens between GeO 4 and GeO 6 . Further, the FT-IR spectra are illustrated in Figure 7B.…”

Section: The Influence Of Fluorination On the Structure Features Ofmentioning

confidence: 96%

“…[17][18][19][20][21][22] Moreover, the tunable Bi-doped fiber lasers operating in different regions of 1100-1800 nm could only be obtained via modulating fiber core composition and applying various pumping sources. [23][24][25][26][27][28] Based on those results, several meaningful ways have been carried out to improve the optical performance of Bi NIR centers such as modifying doping content, 29 modulating chemical composition, 20,30 regulating optical basicity, 31,32 and employing high-energy irradiation. 33,34 Unfortunately, few reports can extend the Bi NIR emission band to the range of 1400-1500 nm to cover the entire communication band.…”

Section: +mentioning

confidence: 99%

“…For example, the intensity and bandwidth of Bi NIR emission remain unsatisfactory. Normally, Bi in diverse glass systems such as silicate, phosphate, and germante glasses only presents one emission band within the range in 1000‐1300 nm and fails to extend to technically relevant C‐ or L‐ band 17‐22 . Moreover, the tunable Bi‐doped fiber lasers operating in different regions of 1100‐1800 nm could only be obtained via modulating fiber core composition and applying various pumping sources 23‐28 .…”

Section: Introductionmentioning

confidence: 99%

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Enhancement of ultrabroadband Bi NIR emission via fluorination for all wavelength amplification of optical communication

et al. 2020

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Bismuth (Bi)-doped photonic glasses and fibers with broadband near-infrared (NIR) photoemission have potential applications in tunable lasers and broadband amplifiers. Yet, when it comes to all wavelength amplification of optical communication, it remains challenging to achieve efficient Bi NIR emission in the technically relevant C-and L-bands (1530-1625 nm). Here, we propose a scheme by fluorination triggered enhancement of ultra-broadband Bi NIR emission in nitrided germanate glasses. Besides, compared to previous research, a unique and efficient Bi-activated ultra-wideband NIR emission with new emission bands peaked at ~924 and ~1520 nm under excitation of 450 nm are obtained in nitrided germanate glasses after fluorination. Moreover, the fluorination can modulate the local chemical environment by forcing the conversion of aluminum species from AlO 4 to AlO 5 and AlO 6 and consequently increase the flexibility of the glass network structure, which finally induces the conversion of Bi species and then manipulates the relative emission intensity of different Bi NIR centers. Thus, a flat and tunable emission spectrum covering the entire optical communication band is obtained by optimizing the fluoride amount. We believe this work is helpful to design the Bi-doped tunable fiber lasers and ultrabroadband amplifiers for all wavelength amplification of optical communication. K E Y W O R D S all wavelength amplification, bismuth, broadband NIR emission, fluorination 1 | INTRODUCTION The speedy development and popularization of informationization promote the continuous increase in scale and complexity of communication networks, and put forward higher requirements for its transmission capacity 1,2. Tunable fiber lasers and wideband optical amplifiers operating in the near-infrared (NIR) region are major components in modern

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“…Materials with broadband near‐infrared (NIR) luminescence are crucial components to raise capacity of communication, yet current gain media are limited by narrow bandwidth. Bi‐doped glasses and fibers have gradually been a focus for the tunable luminescence in NIR region and long lifetime in a variety of glass hosts, making them potential and promising candidates for active media and broadband amplifiers …”

Section: Introductionmentioning

confidence: 99%

Glass‐forming region and enhanced Bi NIR emission in sodium tantalum silicate laser glass

et al. 2018

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Bismuth (Bi)-doped glasses and fibers are of current interest as promising active media for new fiber lasers and amplifiers due to their 800-1700 nm near-infrared (NIR) emission. However, the optically active Bi centers in silica are easily volatilized during high-temperature fiber drawing, which results in low Bi doping concentration and low gain NIR luminescence. Here, we explored the glass-forming region in a model glass system of sodium tantalum silicate (Na 2 O-Ta 2 O 5 -SiO 2 ) glass and attained suitable glass host for enhancing Bi NIR emission, right followed by detailed analysis on optical and structural characterization. Glass-forming region roughly lies in where Ta 2 O 5 ≤ 30 mol%, SiO 2 ≥ 40 mol%, and Na 2 O ≤ 40 mol%. Not only is glass-forming ability improved but also Bi NIR emission is enhanced (~60 times) by the introduction of Ta into glass network.Dissociated Na cations are restricted beside Ta, the high-field-strength element, so that the negative impacts of Na cations on glass formation and Bi NIR emission are weakened, which is responsible for the highly enhanced Bi NIR emission.This work helps us understand the glass-forming of tantalum silicate glass systems and luminescent behaviors of Bi. Hopefully, it could contribute to designing the Bi-doped laser glasses and high gain fibers with stable luminescent properties in future. K E Y W O R D Sbismuth, broadband, photoluminescence, tantalum

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Enhanced NIR photoemission from Bi‐doped aluminoborate glasses via topological tailoring of glass structure

Cited by 14 publications

References 49 publications

Li/Na substitution and Yb3+ co-doping enabling tunable near-infrared emission in LiIn2SbO6:Cr3+ phosphors for light-emitting diodes

Li/Na substitution and Yb3+ co-doping enabling tunable near-infrared emission in LiIn2SbO6:Cr3+ phosphors for light-emitting diodes

Enhancement of ultrabroadband Bi NIR emission via fluorination for all wavelength amplification of optical communication

Glass‐forming region and enhanced Bi NIR emission in sodium tantalum silicate laser glass

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