The Experts below are selected from a list of 6375 Experts worldwide ranked by ideXlab platform
Jianping Chen - One of the best experts on this subject based on the ideXlab platform.
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all optical phase shifter and switch near 1550nm using tungsten disulfide ws2 deposited Tapered Fiber
Optics Express, 2017Co-Authors: Kan Wu, Hao Wang, Xiaoyan Zhang, Jun Wang, Jianping ChenAbstract:All-optical phase shifters and switches play an important role for various all-optical applications including all-optical signal processing, sensing and communication. In this paper, we demonstrate a Fiber all-optical phase shifter using few-layer 2D material tungsten disulfide (WS2) deposited on a Tapered Fiber. WS2 absorbs injected 980 nm pump (control light) and generates heat, which changes the refractive index of both WS2 and Tapered Fiber due to thermo-optic effect and achieves a maximum phase shift of 6.1π near 1550 nm. The device has a loss of 3.7 dB. By constructing a Mach-Zehnder interferometer with WS2 based phase shifter in one arm, an all-optical switch is also obtained with an extinction ratio of 15 dB and a rise time of 7.3 ms. This all Fiber low-cost and compact optical phase shifter and switch demonstrates the potential of 2D transition metal dichalcogenides for all-optical signal processing devices.
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an all optical phase shifter and switch near 1550nm using tungsten disulfide ws2 deposited Tapered Fiber
arXiv: Optics, 2016Co-Authors: Chaoshi Guo, Hao Wang, Xiaoyan Zhang, Jun Wang, Jianping ChenAbstract:Optical phase shifters and switches play an important role for various optical applications including optical signal processing, sensing and communication. In this paper, we demonstrate a Fiber all optical phase shifter using few-layer 2D material tungsten disulfide (WS2) deposited on a Tapered Fiber. WS2 absorbs injected 980 nm pump (control light) and generates heat which changes the refractive index of the Tapered Fiber due to thermo-optic effect and achieves a maximum phase shift of 6.1{\pi} near 1550 nm. The device has a loss of 3.7 dB. By constructing a Mach-Zehnder interferometer with WS2 based phase shifter in one arm, an all optical switch is also obtained with an extinction ratio of 15 dB and a rise time of 7.3 ms. This all Fiber low-cost and compact optical phase shifter and switch demonstrates the potential of 2D transition metal dichalcogenides for all optical signal processing devices.
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Ethanol catalytic deposition of MoS 2 on Tapered Fiber
Photonics Research, 2015Co-Authors: Hao Wang, Xiaoyan Zhang, Jun Wang, Bohua Chen, Sheng Liu, Bangqi Zhu, Jianping ChenAbstract:Deposition of two-dimensional (2D) MoS2 materials on the Tapered Fiber allows various photonic applications including saturable absorbers and four-wave mixing. Ethanol catalytic deposition (ECD) of MoS2 on the optical Tapered Fiber was proposed and demonstrated in this work. Different from the conventional optical driven deposition using water or organic solvent, the ECD method utilized the high volatility of the ethanol solvent, which significantly increased the movement speed of the MoS2 nanosheets and thus boosted the deposition rate and reduced the minimum power threshold to drive the deposition. We believe the ECD method should be able to be applied to other similar 2D materials such as other types of transition metal chalcogenides.
Banshi Dhar Gupta - One of the best experts on this subject based on the ideXlab platform.
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surface plasmon resonance based Tapered Fiber optic sensor with different taper profiles
Optics Communications, 2008Co-Authors: Rajneesh K. Verma, Anuj K Sharma, Banshi Dhar GuptaAbstract:Abstract A theoretical model for surface plasmon resonance (SPR) based Tapered Fiber optic sensor is proposed with three different taper profiles, namely, linear, parabolic, and exponential-linear. The effect of taper ratio and taper profiles on the sensor’s performance is studied in detail and the design considerations for significantly enhanced sensitivity are reported. The study shows that the exponential-linear taper profile with high taper ratio provides the best performance. The physical reasons behind sensitivity enhancement due to taper ratio and taper profile are given, wherever required.
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Surface plasmon resonance-based Tapered Fiber optic sensor: Sensitivity enhancement by introducing a teflon layer between core and metal layer
Plasmonics, 2008Co-Authors: Rajan Jha, Rajneesh K. Verma, Banshi Dhar GuptaAbstract:Surface plasmon resonance (SPR)-based Tapered Fiber optic sensor with Teflon as a dielectric sandwiched between metal and Tapered Fiber core is proposed. The sensitivity of the sensor has been maximized using different combinations of metal and Teflon layer thicknesses for a given taper ratio. The study shows that the sensitivity of the sensor with the introduction of dielectric (Teflon) increases with the increase in the taper ratio. The maximum sensitivity achieved for a given taper ratio is around 15 times higher than the general SPR-based Fiber optic sensor.
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Modeling of Tapered Fiber-optic surface plasmon resonance sensor with enhanced sensitivity
IEEE Photonics Technology Letters, 2007Co-Authors: Rajneesh K. Verma, Anuj K Sharma, Banshi Dhar GuptaAbstract:Theoretical model for surface-plasmon-resonance-based Fiber-optic sensor with a metal-coated uniform core sensing region sandwiched between two identical Tapered Fiber regions is proposed. The effect of taper ratio (TR) on the sensitivity of the sensor is studied. The study shows that the proposed probe geometry with TR lying between 1.5 and 2.0 provides the best performance. The physical reasons behind sensitivity enhancement due to Tapered regions are provided.
Jun Wang - One of the best experts on this subject based on the ideXlab platform.
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Fabrication and sensing characterization of an S-Tapered Fiber probe
AIP Advances, 2020Co-Authors: Guanjun Wang, Jun Wang, Jian Shen, Meiqin Zhang, Mengxing HuangAbstract:This paper presents and analyzes S-Tapered Fiber probe structures. Cutting a conventional S-Tapered Fiber and coating its ends with gold film forms a highly reliable reflective layer. We acquire the reflection spectrum and use it to determine the refractive index (RI) sensitivity of this structure for various RIs and temperatures. The experimental results suggest that this S-Tapered Fiber probe structure has a maximum RI sensitivity of 1441 nm/RI unit in the RI range of 1.336–1.340 and a temperature sensitivity of about 0.7537 nm/°C. In addition, we analyze in detail the mechanism responsible for these high sensitivities.
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all optical phase shifter and switch near 1550nm using tungsten disulfide ws2 deposited Tapered Fiber
Optics Express, 2017Co-Authors: Kan Wu, Hao Wang, Xiaoyan Zhang, Jun Wang, Jianping ChenAbstract:All-optical phase shifters and switches play an important role for various all-optical applications including all-optical signal processing, sensing and communication. In this paper, we demonstrate a Fiber all-optical phase shifter using few-layer 2D material tungsten disulfide (WS2) deposited on a Tapered Fiber. WS2 absorbs injected 980 nm pump (control light) and generates heat, which changes the refractive index of both WS2 and Tapered Fiber due to thermo-optic effect and achieves a maximum phase shift of 6.1π near 1550 nm. The device has a loss of 3.7 dB. By constructing a Mach-Zehnder interferometer with WS2 based phase shifter in one arm, an all-optical switch is also obtained with an extinction ratio of 15 dB and a rise time of 7.3 ms. This all Fiber low-cost and compact optical phase shifter and switch demonstrates the potential of 2D transition metal dichalcogenides for all-optical signal processing devices.
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an all optical phase shifter and switch near 1550nm using tungsten disulfide ws2 deposited Tapered Fiber
arXiv: Optics, 2016Co-Authors: Chaoshi Guo, Hao Wang, Xiaoyan Zhang, Jun Wang, Jianping ChenAbstract:Optical phase shifters and switches play an important role for various optical applications including optical signal processing, sensing and communication. In this paper, we demonstrate a Fiber all optical phase shifter using few-layer 2D material tungsten disulfide (WS2) deposited on a Tapered Fiber. WS2 absorbs injected 980 nm pump (control light) and generates heat which changes the refractive index of the Tapered Fiber due to thermo-optic effect and achieves a maximum phase shift of 6.1{\pi} near 1550 nm. The device has a loss of 3.7 dB. By constructing a Mach-Zehnder interferometer with WS2 based phase shifter in one arm, an all optical switch is also obtained with an extinction ratio of 15 dB and a rise time of 7.3 ms. This all Fiber low-cost and compact optical phase shifter and switch demonstrates the potential of 2D transition metal dichalcogenides for all optical signal processing devices.
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Ethanol catalytic deposition of MoS 2 on Tapered Fiber
Photonics Research, 2015Co-Authors: Hao Wang, Xiaoyan Zhang, Jun Wang, Bohua Chen, Sheng Liu, Bangqi Zhu, Jianping ChenAbstract:Deposition of two-dimensional (2D) MoS2 materials on the Tapered Fiber allows various photonic applications including saturable absorbers and four-wave mixing. Ethanol catalytic deposition (ECD) of MoS2 on the optical Tapered Fiber was proposed and demonstrated in this work. Different from the conventional optical driven deposition using water or organic solvent, the ECD method utilized the high volatility of the ethanol solvent, which significantly increased the movement speed of the MoS2 nanosheets and thus boosted the deposition rate and reduced the minimum power threshold to drive the deposition. We believe the ECD method should be able to be applied to other similar 2D materials such as other types of transition metal chalcogenides.
Hao Wang - One of the best experts on this subject based on the ideXlab platform.
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all optical phase shifter and switch near 1550nm using tungsten disulfide ws2 deposited Tapered Fiber
Optics Express, 2017Co-Authors: Kan Wu, Hao Wang, Xiaoyan Zhang, Jun Wang, Jianping ChenAbstract:All-optical phase shifters and switches play an important role for various all-optical applications including all-optical signal processing, sensing and communication. In this paper, we demonstrate a Fiber all-optical phase shifter using few-layer 2D material tungsten disulfide (WS2) deposited on a Tapered Fiber. WS2 absorbs injected 980 nm pump (control light) and generates heat, which changes the refractive index of both WS2 and Tapered Fiber due to thermo-optic effect and achieves a maximum phase shift of 6.1π near 1550 nm. The device has a loss of 3.7 dB. By constructing a Mach-Zehnder interferometer with WS2 based phase shifter in one arm, an all-optical switch is also obtained with an extinction ratio of 15 dB and a rise time of 7.3 ms. This all Fiber low-cost and compact optical phase shifter and switch demonstrates the potential of 2D transition metal dichalcogenides for all-optical signal processing devices.
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an all optical phase shifter and switch near 1550nm using tungsten disulfide ws2 deposited Tapered Fiber
arXiv: Optics, 2016Co-Authors: Chaoshi Guo, Hao Wang, Xiaoyan Zhang, Jun Wang, Jianping ChenAbstract:Optical phase shifters and switches play an important role for various optical applications including optical signal processing, sensing and communication. In this paper, we demonstrate a Fiber all optical phase shifter using few-layer 2D material tungsten disulfide (WS2) deposited on a Tapered Fiber. WS2 absorbs injected 980 nm pump (control light) and generates heat which changes the refractive index of the Tapered Fiber due to thermo-optic effect and achieves a maximum phase shift of 6.1{\pi} near 1550 nm. The device has a loss of 3.7 dB. By constructing a Mach-Zehnder interferometer with WS2 based phase shifter in one arm, an all optical switch is also obtained with an extinction ratio of 15 dB and a rise time of 7.3 ms. This all Fiber low-cost and compact optical phase shifter and switch demonstrates the potential of 2D transition metal dichalcogenides for all optical signal processing devices.
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Ethanol catalytic deposition of MoS 2 on Tapered Fiber
Photonics Research, 2015Co-Authors: Hao Wang, Xiaoyan Zhang, Jun Wang, Bohua Chen, Sheng Liu, Bangqi Zhu, Jianping ChenAbstract:Deposition of two-dimensional (2D) MoS2 materials on the Tapered Fiber allows various photonic applications including saturable absorbers and four-wave mixing. Ethanol catalytic deposition (ECD) of MoS2 on the optical Tapered Fiber was proposed and demonstrated in this work. Different from the conventional optical driven deposition using water or organic solvent, the ECD method utilized the high volatility of the ethanol solvent, which significantly increased the movement speed of the MoS2 nanosheets and thus boosted the deposition rate and reduced the minimum power threshold to drive the deposition. We believe the ECD method should be able to be applied to other similar 2D materials such as other types of transition metal chalcogenides.
Guoquan Zhang - One of the best experts on this subject based on the ideXlab platform.
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Mode conversion in a Tapered Fiber via a whispering gallery mode resonator and its application as add/drop filter.
Optics letters, 2016Co-Authors: Ligang Huang, Jie Wang, Weihua Peng, Wending Zhang, Feng Gao, Pengfa Chang, Xiaobo Song, Guoquan ZhangAbstract:Based on the conversion between the fundamental mode (LP01) and the higher-order mode (LP11) in a Tapered Fiber via a whispering gallery mode resonator, an add/drop filter was proposed and demonstrated experimentally, in which the resonator only interacted with one Tapered Fiber, rather than two Tapered Fibers as in conventional configurations. The filter gains advantages of easy alignment and low scattering loss over the other filters based on Tapered Fiber and resonator, and will be useful in application.
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tunable add drop channel coupler based on an acousto optic tunable filter and a Tapered Fiber
Optics Letters, 2012Co-Authors: Wending Zhang, Ligang Huang, Feng Gao, Li Xuan, Guoquan ZhangAbstract:We report a tunable add/drop channel coupler based on an acousto-optic tunable filter and a Tapered Fiber. The coupling efficiency and central wavelength of the add/drop channel coupler are tunable by simply tuning the power and frequency of the driving radio frequency signal. Further possible improvements on the configuration are also discussed.