The Experts below are selected from a list of 6075 Experts worldwide ranked by ideXlab platform
Pengfei Wang - One of the best experts on this subject based on the ideXlab platform.
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tm 3 doped fluorotellurite Glass Microsphere resonator laser at 2 3 µm
Optics Letters, 2020Co-Authors: Pengfei Wang, Gilberto Brambilla, Angzhen Li, Shunbin Wang, Xin Wang, Yating Yi, Haiyan ZhaoAbstract:In this Letter, we report lasing at 2.3 µm in Tm3+-single-doped and Tm3+/Ho3+-codoped fluorotellurite Glass Microsphere resonators. By employing a 793 nm diode laser as a pump and exploiting whispering gallery mode microresonators (WGMRs), dual-wavelength lasing at 1.9 and 2.3 µm and triple-wavelength lasing at 1.9, 2.07, and 2.3 µm are achieved in Tm3+-doped and Tm3+/Ho3+-codoped Microspheres, respectively. The introduction of Ho3+ ions significantly reduces the lasing threshold of Tm3+ at 2.3 µm because of energy transfer.
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An Experimental and Theoretical Investigation of a 2 μm Wavelength Low-Threshold Microsphere Laser
Journal of Lightwave Technology, 2020Co-Authors: Jibo Yu, Wenhao Li, Meng Zhang, Sile Nic Chormaic, Xin Wang, Jiquan Zhang, Ke Tian, Yanqiu Du, Pengfei WangAbstract:We present our results on an experimental and theoretical investigation into a Glass Microsphere laser emitting at 2 μm wavelength. First, we fabricated Ho3+-doped tellurite Glass fiber and measured the absorption and emission spectra, and the fluorescence lifetime. Using this fiber, a tellurite Glass Microsphere with a Q-factor of 2 × 106 was also prepared, and a single-mode laser output with a low threshold of 342 μW was observed using a 1150 nm laser as the pump source. The dynamic characteristics of the Microsphere laser were studied theoretically by considering rare-earth ion spectroscopy, the rate equation of the rare-earth energy level, and the light-matter interactions in the Microsphere. This work can be used to study laser emissions with low thresholds in rare-earth doped compound Glass microresonators for a wide range of applications, such as gas sensing, integrated photonics, and medical surgery.
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a tm3 doped zrf4 baf2 yf3 alf3 Glass Microsphere laser in the 2 0 μm wavelength region
Journal of Luminescence, 2019Co-Authors: Haiyan Zhao, Pengfei Wang, Gilberto Brambilla, Angzhen Li, Shunbin Wang, Yating Yi, Masaki TokurakawaAbstract:Abstract This work reports a Microsphere laser at ∼2.0 μm in a Tm3+-doped ZrF4-BaF2-YF3-AlF3 (ZBYA) fluoride Glass. The ZBYA Glass Microsphere was fabricated by reflowing the tip of a 1.0 mol% Tm3+-doped ZBYA Glass fiber with a CO2 laser. By using a fiber taper for input and output coupling in the Tm3+-doped ZBYA Microsphere, single and multi-mode laser outputs at around 2.0 μm were observed under 808 nm laser excitation. The radiation lifetime and emission cross-section of Tm3+ ions in ZBYA Glass were calculated to be 6.42 ms and 5.86 × 10−21 cm2, respectively. Our results indicate that the Tm3+-doped ZBYA fluoride Glass has potential applications for 2.0 μm lasers.
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in fiber temperature sensor based on green up conversion luminescence in an er3 yb3 co doped tellurite Glass Microsphere
Optics Letters, 2019Co-Authors: Meng Zhang, Jibo Yu, Elfed Lewis, Gerald Farrell, Angzhen Li, Shunbin Wang, Xiaosong Lu, Libo Yuan, Pengfei WangAbstract:: A novel, to the best of our knowledge, in-fiber temperature sensor based on green up-conversion (UC) luminescence in an Er3+-Yb3+ co-doped tellurite Glass Microsphere is described. The tellurite Glass Microsphere is located firmly inside a suspended tri-core hollow-fiber (STCHF) structure. The pump light launched via a single-mode fiber (SMF) is passed through a section of multimode fiber, which is fusion spliced between the SMF and the STCHF into the cores suspended inside the hollow fiber and coupled into the Microsphere. Green and red UC emissions of the Er3+ ions are observed using 980 nm pump excitation. The temperature-sensing capability of the tellurite Glass Microsphere is based on the thermally coupled effect between the upper energy levels responsible for green emissions at 528 nm and 549 nm. The resulting fluorescence intensity ratio, depending on the surrounding temperature range from 303 K to 383 K, is experimentally determined, and a maximum sensitivity of 5.47×10-3 K-1 is demonstrated. This novel in-fiber Microsphere-resonator-based device is highly integrated and has the additional advantages of ease of fabrication, compact structure, and low fabrication cost and therefore has great application potential in integrated optical sources including lasers.
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tm3 ho3 codoped tellurite Glass Microsphere laser in the 147 μm wavelength region
Optics Letters, 2019Co-Authors: Angzhen Li, Elfed Lewis, Gilberto Brambilla, Wenhao Li, Meng Zhang, Yindong Zhang, Shunbin Wang, Anping Yang, Zhiyong Yang, Pengfei WangAbstract:: In this Letter, a Tm3+-Ho3+ codoped tellurite Glass Microsphere laser in the 1.47 μm wavelength region is described. Using a traditional tapered microfiber-Microsphere coupling method, multimode and single-mode lasing around the wavelength of 1.47 μm is observed using an 802 nm laser diode as a pump source. This Tm3+-Ho3+ codoped tellurite Glass Microsphere laser can be used in near-infrared telecommunications, biomedical, and astrophysical applications.
N Peyghambarian - One of the best experts on this subject based on the ideXlab platform.
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2μm lasing from highly thulium doped tellurite Glass Microsphere
Applied Physics Letters, 2005Co-Authors: Jianfeng Wu, Shibin Jiang, Makoto Kuwatagonokami, N PeyghambarianAbstract:A single mode Microsphere laser at 2μm is demonstrated from a highly thulium doped tellurite Glass Microsphere. Glass samples with various doping concentrations are fabricated and characterized to choose the material with the highest pump efficiency. The laser wavelength is redshifted from the emission peak of thulium ions at 1800 nm due to the different mode distribution inside the Microsphere. The laser line width (full width at half maximum) is measured as 115 MHz.
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er 3 doped tellurite Glass Microsphere laser optical properties coupling scheme and lasing characteristics
Optical Engineering, 2005Co-Authors: Xiang Peng, Feng Song, Shibin Jiang, Makoto Kuwatagonokami, N PeyghambarianAbstract:We present a comprehensive review of work on the Er3+-doped tellurite Glass Microsphere laser. We discuss the optical properties of Er3+-doped tellurite Glass, including the emission cross section, the absorption cross section, and the lifetime analysis. Whispering-gallery modes in Microspheres and fiber-taper coupling schemes are described, and theoretical analysis is performed for optimization. Finally, lasing characteristics such as the threshold, the lasing wavelength, and the temperature dependence of the Microsphere laser are analyzed. Microsphere lasers with different Er2O3 doping concentrations have been fabricated and examined. A state-of-the-art L-band Microsphere laser with 124.5-µW maximum output power is demonstrated. These miniature Microsphere lasers have great potential and have attracted considerable attention because of their versatility for signal processing, fiber communication, and photon computation, as well as laser stabilization and sensing applications.
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temperature dependence of the wavelength and threshold of fiber taper coupled l band er3 doped tellurite Glass Microsphere laser
Applied Physics Letters, 2003Co-Authors: Xiang Peng, Feng Song, Shibin Jiang, Makoto Kuwatagonokami, N PeyghambarianAbstract:We report on the temperature dependence of L-band laser emission of fiber-taper-coupled Er3+-doped tellurite Glass Microsphere. The Microsphere laser emission threshold increased and the emitted laser wavelength shifted with temperature. The experimental results are explained with a quasi-four-level model, showing that a significant reduction of laser threshold can be achieved at lower temperatures and higher Q values of this Microsphere laser.
Makoto Kuwatagonokami - One of the best experts on this subject based on the ideXlab platform.
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2μm lasing from highly thulium doped tellurite Glass Microsphere
Applied Physics Letters, 2005Co-Authors: Jianfeng Wu, Shibin Jiang, Makoto Kuwatagonokami, N PeyghambarianAbstract:A single mode Microsphere laser at 2μm is demonstrated from a highly thulium doped tellurite Glass Microsphere. Glass samples with various doping concentrations are fabricated and characterized to choose the material with the highest pump efficiency. The laser wavelength is redshifted from the emission peak of thulium ions at 1800 nm due to the different mode distribution inside the Microsphere. The laser line width (full width at half maximum) is measured as 115 MHz.
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er 3 doped tellurite Glass Microsphere laser optical properties coupling scheme and lasing characteristics
Optical Engineering, 2005Co-Authors: Xiang Peng, Feng Song, Shibin Jiang, Makoto Kuwatagonokami, N PeyghambarianAbstract:We present a comprehensive review of work on the Er3+-doped tellurite Glass Microsphere laser. We discuss the optical properties of Er3+-doped tellurite Glass, including the emission cross section, the absorption cross section, and the lifetime analysis. Whispering-gallery modes in Microspheres and fiber-taper coupling schemes are described, and theoretical analysis is performed for optimization. Finally, lasing characteristics such as the threshold, the lasing wavelength, and the temperature dependence of the Microsphere laser are analyzed. Microsphere lasers with different Er2O3 doping concentrations have been fabricated and examined. A state-of-the-art L-band Microsphere laser with 124.5-µW maximum output power is demonstrated. These miniature Microsphere lasers have great potential and have attracted considerable attention because of their versatility for signal processing, fiber communication, and photon computation, as well as laser stabilization and sensing applications.
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temperature dependence of the wavelength and threshold of fiber taper coupled l band er3 doped tellurite Glass Microsphere laser
Applied Physics Letters, 2003Co-Authors: Xiang Peng, Feng Song, Shibin Jiang, Makoto Kuwatagonokami, N PeyghambarianAbstract:We report on the temperature dependence of L-band laser emission of fiber-taper-coupled Er3+-doped tellurite Glass Microsphere. The Microsphere laser emission threshold increased and the emitted laser wavelength shifted with temperature. The experimental results are explained with a quasi-four-level model, showing that a significant reduction of laser threshold can be achieved at lower temperatures and higher Q values of this Microsphere laser.
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fiber taper coupled l band er3 doped tellurite Glass Microsphere laser
Applied Physics Letters, 2003Co-Authors: Xiang Peng, Feng Song, Shibin Jiang, Nasser N Peyghambarian, Makoto Kuwatagonokami, Lei XuAbstract:Er3+-doped tellurite Glass Microspheres were fabricated. The Microspheres were made by a spin method. A tapered fiber was used to couple the pump into the Microsphere and couple out the laser. L-band Microsphere laser is demonstrated. This miniature Er3+-doped tellurite Glass Microsphere laser can be used in photonic microdevices.
Angzhen Li - One of the best experts on this subject based on the ideXlab platform.
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tm 3 doped fluorotellurite Glass Microsphere resonator laser at 2 3 µm
Optics Letters, 2020Co-Authors: Pengfei Wang, Gilberto Brambilla, Angzhen Li, Shunbin Wang, Xin Wang, Yating Yi, Haiyan ZhaoAbstract:In this Letter, we report lasing at 2.3 µm in Tm3+-single-doped and Tm3+/Ho3+-codoped fluorotellurite Glass Microsphere resonators. By employing a 793 nm diode laser as a pump and exploiting whispering gallery mode microresonators (WGMRs), dual-wavelength lasing at 1.9 and 2.3 µm and triple-wavelength lasing at 1.9, 2.07, and 2.3 µm are achieved in Tm3+-doped and Tm3+/Ho3+-codoped Microspheres, respectively. The introduction of Ho3+ ions significantly reduces the lasing threshold of Tm3+ at 2.3 µm because of energy transfer.
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a tm3 doped zrf4 baf2 yf3 alf3 Glass Microsphere laser in the 2 0 μm wavelength region
Journal of Luminescence, 2019Co-Authors: Haiyan Zhao, Pengfei Wang, Gilberto Brambilla, Angzhen Li, Shunbin Wang, Yating Yi, Masaki TokurakawaAbstract:Abstract This work reports a Microsphere laser at ∼2.0 μm in a Tm3+-doped ZrF4-BaF2-YF3-AlF3 (ZBYA) fluoride Glass. The ZBYA Glass Microsphere was fabricated by reflowing the tip of a 1.0 mol% Tm3+-doped ZBYA Glass fiber with a CO2 laser. By using a fiber taper for input and output coupling in the Tm3+-doped ZBYA Microsphere, single and multi-mode laser outputs at around 2.0 μm were observed under 808 nm laser excitation. The radiation lifetime and emission cross-section of Tm3+ ions in ZBYA Glass were calculated to be 6.42 ms and 5.86 × 10−21 cm2, respectively. Our results indicate that the Tm3+-doped ZBYA fluoride Glass has potential applications for 2.0 μm lasers.
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in fiber temperature sensor based on green up conversion luminescence in an er3 yb3 co doped tellurite Glass Microsphere
Optics Letters, 2019Co-Authors: Meng Zhang, Jibo Yu, Elfed Lewis, Gerald Farrell, Angzhen Li, Shunbin Wang, Xiaosong Lu, Libo Yuan, Pengfei WangAbstract:: A novel, to the best of our knowledge, in-fiber temperature sensor based on green up-conversion (UC) luminescence in an Er3+-Yb3+ co-doped tellurite Glass Microsphere is described. The tellurite Glass Microsphere is located firmly inside a suspended tri-core hollow-fiber (STCHF) structure. The pump light launched via a single-mode fiber (SMF) is passed through a section of multimode fiber, which is fusion spliced between the SMF and the STCHF into the cores suspended inside the hollow fiber and coupled into the Microsphere. Green and red UC emissions of the Er3+ ions are observed using 980 nm pump excitation. The temperature-sensing capability of the tellurite Glass Microsphere is based on the thermally coupled effect between the upper energy levels responsible for green emissions at 528 nm and 549 nm. The resulting fluorescence intensity ratio, depending on the surrounding temperature range from 303 K to 383 K, is experimentally determined, and a maximum sensitivity of 5.47×10-3 K-1 is demonstrated. This novel in-fiber Microsphere-resonator-based device is highly integrated and has the additional advantages of ease of fabrication, compact structure, and low fabrication cost and therefore has great application potential in integrated optical sources including lasers.
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tm3 ho3 codoped tellurite Glass Microsphere laser in the 147 μm wavelength region
Optics Letters, 2019Co-Authors: Angzhen Li, Elfed Lewis, Gilberto Brambilla, Wenhao Li, Meng Zhang, Yindong Zhang, Shunbin Wang, Anping Yang, Zhiyong Yang, Pengfei WangAbstract:: In this Letter, a Tm3+-Ho3+ codoped tellurite Glass Microsphere laser in the 1.47 μm wavelength region is described. Using a traditional tapered microfiber-Microsphere coupling method, multimode and single-mode lasing around the wavelength of 1.47 μm is observed using an 802 nm laser diode as a pump source. This Tm3+-Ho3+ codoped tellurite Glass Microsphere laser can be used in near-infrared telecommunications, biomedical, and astrophysical applications.
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Up-Conversion Luminescence and C-Band Laser in Er3+-Doped Fluorozirconate Glass Microsphere Resonator
IEEE Photonics Journal, 2019Co-Authors: Haiyan Zhao, Elfed Lewis, Angzhen Li, Wenhao Li, Shunbin Wang, Xin Wang, Ruicong Wang, Pengfei WangAbstract:Up-conversion luminescence and C-band Microsphere laser output is reported for an Er3+-doped ZrF4-BaF2-YF3-AlF3 (ZBYA) fluorozirconate Glass Microsphere. The Microsphere was fabricated by heating a ZBYA Glass filament using a CO2 laser beam. The fabrication process accurately and repeatably produces Microspheres of 68 μm diameter. The input and output laser light was coupled to the Microsphere using a tapered optical fiber. The coupling position between the tapered fiber and Microsphere was adjusted using a sophisticated three-dimensional translation stage. The up-conversion luminescence emission, single-mode and multi-mode laser at C-band (1530 to 1565 nm) were observed when pumped using a 980 nm laser.
Shunbin Wang - One of the best experts on this subject based on the ideXlab platform.
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tm 3 doped fluorotellurite Glass Microsphere resonator laser at 2 3 µm
Optics Letters, 2020Co-Authors: Pengfei Wang, Gilberto Brambilla, Angzhen Li, Shunbin Wang, Xin Wang, Yating Yi, Haiyan ZhaoAbstract:In this Letter, we report lasing at 2.3 µm in Tm3+-single-doped and Tm3+/Ho3+-codoped fluorotellurite Glass Microsphere resonators. By employing a 793 nm diode laser as a pump and exploiting whispering gallery mode microresonators (WGMRs), dual-wavelength lasing at 1.9 and 2.3 µm and triple-wavelength lasing at 1.9, 2.07, and 2.3 µm are achieved in Tm3+-doped and Tm3+/Ho3+-codoped Microspheres, respectively. The introduction of Ho3+ ions significantly reduces the lasing threshold of Tm3+ at 2.3 µm because of energy transfer.
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a tm3 doped zrf4 baf2 yf3 alf3 Glass Microsphere laser in the 2 0 μm wavelength region
Journal of Luminescence, 2019Co-Authors: Haiyan Zhao, Pengfei Wang, Gilberto Brambilla, Angzhen Li, Shunbin Wang, Yating Yi, Masaki TokurakawaAbstract:Abstract This work reports a Microsphere laser at ∼2.0 μm in a Tm3+-doped ZrF4-BaF2-YF3-AlF3 (ZBYA) fluoride Glass. The ZBYA Glass Microsphere was fabricated by reflowing the tip of a 1.0 mol% Tm3+-doped ZBYA Glass fiber with a CO2 laser. By using a fiber taper for input and output coupling in the Tm3+-doped ZBYA Microsphere, single and multi-mode laser outputs at around 2.0 μm were observed under 808 nm laser excitation. The radiation lifetime and emission cross-section of Tm3+ ions in ZBYA Glass were calculated to be 6.42 ms and 5.86 × 10−21 cm2, respectively. Our results indicate that the Tm3+-doped ZBYA fluoride Glass has potential applications for 2.0 μm lasers.
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in fiber temperature sensor based on green up conversion luminescence in an er3 yb3 co doped tellurite Glass Microsphere
Optics Letters, 2019Co-Authors: Meng Zhang, Jibo Yu, Elfed Lewis, Gerald Farrell, Angzhen Li, Shunbin Wang, Xiaosong Lu, Libo Yuan, Pengfei WangAbstract:: A novel, to the best of our knowledge, in-fiber temperature sensor based on green up-conversion (UC) luminescence in an Er3+-Yb3+ co-doped tellurite Glass Microsphere is described. The tellurite Glass Microsphere is located firmly inside a suspended tri-core hollow-fiber (STCHF) structure. The pump light launched via a single-mode fiber (SMF) is passed through a section of multimode fiber, which is fusion spliced between the SMF and the STCHF into the cores suspended inside the hollow fiber and coupled into the Microsphere. Green and red UC emissions of the Er3+ ions are observed using 980 nm pump excitation. The temperature-sensing capability of the tellurite Glass Microsphere is based on the thermally coupled effect between the upper energy levels responsible for green emissions at 528 nm and 549 nm. The resulting fluorescence intensity ratio, depending on the surrounding temperature range from 303 K to 383 K, is experimentally determined, and a maximum sensitivity of 5.47×10-3 K-1 is demonstrated. This novel in-fiber Microsphere-resonator-based device is highly integrated and has the additional advantages of ease of fabrication, compact structure, and low fabrication cost and therefore has great application potential in integrated optical sources including lasers.
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tm3 ho3 codoped tellurite Glass Microsphere laser in the 147 μm wavelength region
Optics Letters, 2019Co-Authors: Angzhen Li, Elfed Lewis, Gilberto Brambilla, Wenhao Li, Meng Zhang, Yindong Zhang, Shunbin Wang, Anping Yang, Zhiyong Yang, Pengfei WangAbstract:: In this Letter, a Tm3+-Ho3+ codoped tellurite Glass Microsphere laser in the 1.47 μm wavelength region is described. Using a traditional tapered microfiber-Microsphere coupling method, multimode and single-mode lasing around the wavelength of 1.47 μm is observed using an 802 nm laser diode as a pump source. This Tm3+-Ho3+ codoped tellurite Glass Microsphere laser can be used in near-infrared telecommunications, biomedical, and astrophysical applications.
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Up-Conversion Luminescence and C-Band Laser in Er3+-Doped Fluorozirconate Glass Microsphere Resonator
IEEE Photonics Journal, 2019Co-Authors: Haiyan Zhao, Elfed Lewis, Angzhen Li, Wenhao Li, Shunbin Wang, Xin Wang, Ruicong Wang, Pengfei WangAbstract:Up-conversion luminescence and C-band Microsphere laser output is reported for an Er3+-doped ZrF4-BaF2-YF3-AlF3 (ZBYA) fluorozirconate Glass Microsphere. The Microsphere was fabricated by heating a ZBYA Glass filament using a CO2 laser beam. The fabrication process accurately and repeatably produces Microspheres of 68 μm diameter. The input and output laser light was coupled to the Microsphere using a tapered optical fiber. The coupling position between the tapered fiber and Microsphere was adjusted using a sophisticated three-dimensional translation stage. The up-conversion luminescence emission, single-mode and multi-mode laser at C-band (1530 to 1565 nm) were observed when pumped using a 980 nm laser.