2.0 μm Ultra Broadband Emission from Tm<sup>3+</sup>/Ho<sup>3+</sup> Co-Doped Gallium Tellurite Glasses for Broadband Light Sources and Tunable Fiber Lasers
A flat 2.0 μm ultra broadband emission with a full width at half maximum (FWHM) of 329 nm is achieved in 1 mol.% Tm<sub>2</sub>O<sub>3</sub> and 0.05 mol.% Ho<sub>2</sub>O<sub>3</sub> co-doped gallium tellurite glasses upon the excitation of an 808 nm...
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MDPI AG
2021-02-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/11/2/190 |
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| author | Jian Yuan Weichao Wang Yichen Ye Tingting Deng Yizhao Huang Shitao Gu Yuanbin Chen Peng Xiao |
| author_facet | Jian Yuan Weichao Wang Yichen Ye Tingting Deng Yizhao Huang Shitao Gu Yuanbin Chen Peng Xiao |
| author_sort | Jian Yuan |
| collection | DOAJ |
| description | A flat 2.0 μm ultra broadband emission with a full width at half maximum (FWHM) of 329 nm is achieved in 1 mol.% Tm<sub>2</sub>O<sub>3</sub> and 0.05 mol.% Ho<sub>2</sub>O<sub>3</sub> co-doped gallium tellurite glasses upon the excitation of an 808 nm laser diode. The influence of Tm<sup>3+</sup> and Ho<sup>3+</sup> contents on 2.0 μm spectroscopic properties of gallium tellurite glasses is minutely investigated by absorption spectra, emission spectra, and lifetime measurement. In addition, emission cross section and gain coefficient of Ho<sup>3+</sup> ions at 2.0 μm are calculated, and the maximum values reach 8.2 × 10<sup>−21</sup> cm<sup>2</sup> and 1.54 cm<sup>−1</sup>, respectively. Moreover, forward and backward energy transfer probability between Tm<sup>3+</sup> and Ho<sup>3+</sup> ions are qualitatively evaluated by the extended spectral overlap method. Large ratio of the forward energy transfer from Tm<sup>3+</sup> to Ho<sup>3+</sup> to the backward one (19.7) and high forward energy transfer coefficient (6.22 × 10<sup>39</sup> cm<sup>6</sup>/s) are responsible for effective 2.0 μm emission from Ho<sup>3+</sup> ions. These results manifest that Tm<sup>3+</sup>/Ho<sup>3+</sup> co-doped gallium tellurite glass is suitable for potential applications of broadband light sources and tunable fiber lasers operating in eye-safe 2.0 µm spectral region. |
| first_indexed | 2024-03-09T00:51:21Z |
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| institution | Directory Open Access Journal |
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| language | English |
| last_indexed | 2024-03-09T00:51:21Z |
| publishDate | 2021-02-01 |
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| record_format | Article |
| series | Crystals |
| spelling | doaj.art-473cb0ccc9c0411986b7d9e84d9baa2c2023-12-11T17:10:08ZengMDPI AGCrystals2073-43522021-02-0111219010.3390/cryst110201902.0 μm Ultra Broadband Emission from Tm<sup>3+</sup>/Ho<sup>3+</sup> Co-Doped Gallium Tellurite Glasses for Broadband Light Sources and Tunable Fiber LasersJian Yuan0Weichao Wang1Yichen Ye2Tingting Deng3Yizhao Huang4Shitao Gu5Yuanbin Chen6Peng Xiao7Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, Foshan University, Foshan 528000, ChinaState Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510641, ChinaState Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510641, ChinaGuangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, Foshan University, Foshan 528000, ChinaGuangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, Foshan University, Foshan 528000, ChinaGuangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, Foshan University, Foshan 528000, ChinaGuangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, Foshan University, Foshan 528000, ChinaGuangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, Foshan University, Foshan 528000, ChinaA flat 2.0 μm ultra broadband emission with a full width at half maximum (FWHM) of 329 nm is achieved in 1 mol.% Tm<sub>2</sub>O<sub>3</sub> and 0.05 mol.% Ho<sub>2</sub>O<sub>3</sub> co-doped gallium tellurite glasses upon the excitation of an 808 nm laser diode. The influence of Tm<sup>3+</sup> and Ho<sup>3+</sup> contents on 2.0 μm spectroscopic properties of gallium tellurite glasses is minutely investigated by absorption spectra, emission spectra, and lifetime measurement. In addition, emission cross section and gain coefficient of Ho<sup>3+</sup> ions at 2.0 μm are calculated, and the maximum values reach 8.2 × 10<sup>−21</sup> cm<sup>2</sup> and 1.54 cm<sup>−1</sup>, respectively. Moreover, forward and backward energy transfer probability between Tm<sup>3+</sup> and Ho<sup>3+</sup> ions are qualitatively evaluated by the extended spectral overlap method. Large ratio of the forward energy transfer from Tm<sup>3+</sup> to Ho<sup>3+</sup> to the backward one (19.7) and high forward energy transfer coefficient (6.22 × 10<sup>39</sup> cm<sup>6</sup>/s) are responsible for effective 2.0 μm emission from Ho<sup>3+</sup> ions. These results manifest that Tm<sup>3+</sup>/Ho<sup>3+</sup> co-doped gallium tellurite glass is suitable for potential applications of broadband light sources and tunable fiber lasers operating in eye-safe 2.0 µm spectral region.https://www.mdpi.com/2073-4352/11/2/190gallium tellurite glassTm<sup>3+</sup>/Ho<sup>3+</sup> co-doped2.0 μm ultra broadband emissionenergy transfertunable fiber laser |
| spellingShingle | Jian Yuan Weichao Wang Yichen Ye Tingting Deng Yizhao Huang Shitao Gu Yuanbin Chen Peng Xiao 2.0 μm Ultra Broadband Emission from Tm<sup>3+</sup>/Ho<sup>3+</sup> Co-Doped Gallium Tellurite Glasses for Broadband Light Sources and Tunable Fiber Lasers Crystals gallium tellurite glass Tm<sup>3+</sup>/Ho<sup>3+</sup> co-doped 2.0 μm ultra broadband emission energy transfer tunable fiber laser |
| title | 2.0 μm Ultra Broadband Emission from Tm<sup>3+</sup>/Ho<sup>3+</sup> Co-Doped Gallium Tellurite Glasses for Broadband Light Sources and Tunable Fiber Lasers |
| title_full | 2.0 μm Ultra Broadband Emission from Tm<sup>3+</sup>/Ho<sup>3+</sup> Co-Doped Gallium Tellurite Glasses for Broadband Light Sources and Tunable Fiber Lasers |
| title_fullStr | 2.0 μm Ultra Broadband Emission from Tm<sup>3+</sup>/Ho<sup>3+</sup> Co-Doped Gallium Tellurite Glasses for Broadband Light Sources and Tunable Fiber Lasers |
| title_full_unstemmed | 2.0 μm Ultra Broadband Emission from Tm<sup>3+</sup>/Ho<sup>3+</sup> Co-Doped Gallium Tellurite Glasses for Broadband Light Sources and Tunable Fiber Lasers |
| title_short | 2.0 μm Ultra Broadband Emission from Tm<sup>3+</sup>/Ho<sup>3+</sup> Co-Doped Gallium Tellurite Glasses for Broadband Light Sources and Tunable Fiber Lasers |
| title_sort | 2 0 μm ultra broadband emission from tm sup 3 sup ho sup 3 sup co doped gallium tellurite glasses for broadband light sources and tunable fiber lasers |
| topic | gallium tellurite glass Tm<sup>3+</sup>/Ho<sup>3+</sup> co-doped 2.0 μm ultra broadband emission energy transfer tunable fiber laser |
| url | https://www.mdpi.com/2073-4352/11/2/190 |
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