The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Li-bo Yuan - One of the best experts on this subject based on the ideXlab platform.
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graphene decorated twin core fiber Michelson Interferometer for all optical phase shifter and switch
Optics Letters, 2020Co-Authors: Rang Chu, Chunying Guan, Jun Yang, Jing Liu, Jinhui Shi, Jing Yang, Li-bo YuanAbstract:We investigated an all-optical phase shifter and switch based on a graphene decorated side-polished twin-core fiber (TCF) Michelson Interferometer (MI). The MI was fabricated by tapering the splicing point between the TCF and single-mode fiber. The flat surface of exposed polished core in the TCF was coated with monolayer graphene. A 980 nm pump laser is used to produce a photothermal effect. The graphene’s ohmic heating changes the effective refractive index of the exposed core, resulting in the phase shift of the MI. The MI with a polished length of 5 mm has a significant modulation phase shift with a nearly linear slope of ${0.0102}\;\pi / {\rm mW}$0.0102π/mW near the wavelength of 1550 nm and can obtain an extinction ratio of 7 dB for optical switching with a rise (fall) time of 55.8 ms (15.5 ms). The high-density integration and all-optical control enable the proposed device to have great potential in the miniaturization of optical devices and all-optical signal processing.
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all optical graphene oxide humidity sensor based on a side polished symmetrical twin core fiber Michelson Interferometer
Sensors and Actuators B-chemical, 2019Co-Authors: Chunying Guan, Jun Yang, Yutao Bo, Ping Li, Li-bo YuanAbstract:Abstract A high-sensitive graphene-oxide (GO) humidity sensor based on a side-polished twin-core fiber (SPTCF) Michelson Interferometer (MI) has been demonstrated. The MI was fabricated by splicing a section of TCF to a standard single mode fiber (SMF) and tapering the splicing point. The exposed polished core has a stronger evanescent field and enhances the interaction between light and external environment. The GO-SPTCFMI can operate in the wavelength- and intensity- modulated sensor. The super-high humidity sensitivities of ˜2.72 nm/RH% in the RH range of 40–75% and ˜3.76 dB/RH% in the RH range of 60–62.1% are obtained experimentally. The high-performance GO-SPTCFMI is a promising candidate for potential applications, such as gas sensing and biochemical detection.
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Asymmetrical Twin-Core Fiber Based Michelson Interferometer for Refractive Index Sensing
Journal of Lightwave Technology, 2011Co-Authors: Ai Zhou, Guangping Li, Chunying Guan, Yanhui Zhang, Yuzhuo Wang, Jun Yang, Li-bo YuanAbstract:An asymmetrical twin-core fiber based Michelson Interferometer is reported as a refractive index sensor. One core of the twin-core fiber locates at the fiber center and the other core is 26 μ m away from the central core. Part of the cladding of the twin-core fiber over a small length is removed by chemical etching to make the effective refractive index of the fundamental mode of the side core is sensitive to the ambient refractive index. Therefore, the interference spectrum between the central core and the side core shifts with the variation of the ambient refractive index. The sensitivity of such a Michelson Interferometer is ~ 270 nm/RIU in the range of 1.34-1.38.
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integrated fiber Michelson Interferometer based on poled hollow twin core fiber
Optics Letters, 2011Co-Authors: Zhihai Liu, Fengjun Tian, Lei Wang, Li-bo YuanAbstract:We propose an integrated fiber Michelson Interferometer based on a poled hollow twin-core fiber. The Michelson Interferometer can be used as an electro-optic modulator by thermal poling one core of the twin-core fiber and introducing second-order nonlinearity in the fiber. The proposed fiber Michelson Interferometer is experimentally demonstrated under driving voltages at the frequency range of 149 to 1000 Hz. The half-wave voltage of the poled fiber is 135 V, and the effective second-order nonlinear coefficient χ2 is 1.23 pm/V.
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composite cavity based fiber optic fabry perot strain sensors demodulated by an unbalanced fiber optic Michelson Interferometer with an electrical scanning mirror
Measurement Science and Technology, 2008Co-Authors: Jianzhong Zhang, Wencai Jin, Li-bo Yuan, Weimin Sun, Jun Yang, Gangding PengAbstract:A composite cavity based fiber optic Fabry–Perot strain sensor system, interrogated by a white light source and demodulated by an unbalanced fiber optic Michelson Interferometer with an electrical scanning mirror, is proposed and demonstrated. Comparing with the traditional extrinsic fiber optic Fabry–Perot strain sensor, the potential multiplexing capability and the dynamic measurement range are improved simultaneously. At the same time, the measurement stability of the electrical scanning mirror system is improved by the self-referenced signal of the sensor structure.
Guolu Yin - One of the best experts on this subject based on the ideXlab platform.
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intensity modulated refractive index sensor based on optical fiber Michelson Interferometer
Sensors and Actuators B-chemical, 2015Co-Authors: Jiangtao Zhou, Changrui Liao, Yiping Wang, Shen Liu, Xiaoyong Zhong, Guolu Yin, Bing Sun, Guanjun Wang, Jing ZhaoAbstract:a b s t r a c t We demonstrated a refractive index (RI) sensor based on optical fiber Michelson Interferometer (MI), which was fabricated by splicing a section of thin core fiber (TCF) to a standard single mode fiber with a core offset. Experimentally, such a MI-based RI sensor with a core offset of 8 m and a TCF length of 3 mm exhibits a high resolution of 4.9 × 10−6 RIU and sensitivity of −202.46 dB/RIU, which is two or three times higher than that of intensity-modulated RI sensors reported previously. In contrast, our MIbased RI sensor is insensitive to temperature, thus overcoming the cross-sensitivity problem between surrounding RI and temperature. Moreover, intensity modulation, rather than wavelength modulation, was used in the proposed MI-based RI sensor, and the sensor also has the advantages of compact size (8 mm), simple structure, easy fabrication, and good repeatability. © 2014 Published by Elsevier B.V.
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intensity modulated refractive index sensor based on optical fiber Michelson Interferometer
Sensors and Actuators B-chemical, 2015Co-Authors: Jiangtao Zhou, Changrui Liao, Yiping Wang, Shen Liu, Guolu Yin, Bing Sun, Jun He, Zhengyong Li, Guanjun Wang, Xiaoyong ZhongAbstract:Abstract We demonstrated a refractive index (RI) sensor based on optical fiber Michelson Interferometer (MI), which was fabricated by splicing a section of thin core fiber (TCF) to a standard single mode fiber with a core offset. Experimentally, such a MI-based RI sensor with a core offset of 8 μm and a TCF length of 3 mm exhibits a high resolution of 4.9 × 10−6 RIU and sensitivity of −202.46 dB/RIU, which is two or three times higher than that of intensity-modulated RI sensors reported previously. In contrast, our MI-based RI sensor is insensitive to temperature, thus overcoming the cross-sensitivity problem between surrounding RI and temperature. Moreover, intensity modulation, rather than wavelength modulation, was used in the proposed MI-based RI sensor, and the sensor also has the advantages of compact size (8 mm), simple structure, easy fabrication, and good repeatability.
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temperature insensitive refractive index sensor based on in fiber Michelson Interferometer
Sensors and Actuators B-chemical, 2014Co-Authors: Yiping Wang, Changrui Liao, Shen Liu, Jiangtao Zhou, Xiaoyong Zhong, Yingjie Liu, Kaiming Yang, Qiao Wang, Guolu YinAbstract:Abstract A novel intensity-modulated refractive index sensor based on an in-fiber Michelson Interferometer is demonstrated by splicing a section of thin core fiber between two standard single mode fibers. Such a refractive index sensor exhibits an ultrahigh sensitivity of −208.24 and 125.44 dB/RIU at the refractive index of 1.440 and 1.500, respectively. The refractive index sensor is insensitive to temperature and thus solves the cross-sensitivity problem between temperature and surrounding refractive index. Moreover, the promising RI sensor has the advantages of short size (less than 2 mm) and easy fabrication.
Jun Yang - One of the best experts on this subject based on the ideXlab platform.
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graphene decorated twin core fiber Michelson Interferometer for all optical phase shifter and switch
Optics Letters, 2020Co-Authors: Rang Chu, Chunying Guan, Jun Yang, Jing Liu, Jinhui Shi, Jing Yang, Li-bo YuanAbstract:We investigated an all-optical phase shifter and switch based on a graphene decorated side-polished twin-core fiber (TCF) Michelson Interferometer (MI). The MI was fabricated by tapering the splicing point between the TCF and single-mode fiber. The flat surface of exposed polished core in the TCF was coated with monolayer graphene. A 980 nm pump laser is used to produce a photothermal effect. The graphene’s ohmic heating changes the effective refractive index of the exposed core, resulting in the phase shift of the MI. The MI with a polished length of 5 mm has a significant modulation phase shift with a nearly linear slope of ${0.0102}\;\pi / {\rm mW}$0.0102π/mW near the wavelength of 1550 nm and can obtain an extinction ratio of 7 dB for optical switching with a rise (fall) time of 55.8 ms (15.5 ms). The high-density integration and all-optical control enable the proposed device to have great potential in the miniaturization of optical devices and all-optical signal processing.
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all optical graphene oxide humidity sensor based on a side polished symmetrical twin core fiber Michelson Interferometer
Sensors and Actuators B-chemical, 2019Co-Authors: Chunying Guan, Jun Yang, Yutao Bo, Ping Li, Li-bo YuanAbstract:Abstract A high-sensitive graphene-oxide (GO) humidity sensor based on a side-polished twin-core fiber (SPTCF) Michelson Interferometer (MI) has been demonstrated. The MI was fabricated by splicing a section of TCF to a standard single mode fiber (SMF) and tapering the splicing point. The exposed polished core has a stronger evanescent field and enhances the interaction between light and external environment. The GO-SPTCFMI can operate in the wavelength- and intensity- modulated sensor. The super-high humidity sensitivities of ˜2.72 nm/RH% in the RH range of 40–75% and ˜3.76 dB/RH% in the RH range of 60–62.1% are obtained experimentally. The high-performance GO-SPTCFMI is a promising candidate for potential applications, such as gas sensing and biochemical detection.
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Asymmetrical Twin-Core Fiber Based Michelson Interferometer for Refractive Index Sensing
Journal of Lightwave Technology, 2011Co-Authors: Ai Zhou, Guangping Li, Chunying Guan, Yanhui Zhang, Yuzhuo Wang, Jun Yang, Li-bo YuanAbstract:An asymmetrical twin-core fiber based Michelson Interferometer is reported as a refractive index sensor. One core of the twin-core fiber locates at the fiber center and the other core is 26 μ m away from the central core. Part of the cladding of the twin-core fiber over a small length is removed by chemical etching to make the effective refractive index of the fundamental mode of the side core is sensitive to the ambient refractive index. Therefore, the interference spectrum between the central core and the side core shifts with the variation of the ambient refractive index. The sensitivity of such a Michelson Interferometer is ~ 270 nm/RIU in the range of 1.34-1.38.
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composite cavity based fiber optic fabry perot strain sensors demodulated by an unbalanced fiber optic Michelson Interferometer with an electrical scanning mirror
Measurement Science and Technology, 2008Co-Authors: Jianzhong Zhang, Wencai Jin, Li-bo Yuan, Weimin Sun, Jun Yang, Gangding PengAbstract:A composite cavity based fiber optic Fabry–Perot strain sensor system, interrogated by a white light source and demodulated by an unbalanced fiber optic Michelson Interferometer with an electrical scanning mirror, is proposed and demonstrated. Comparing with the traditional extrinsic fiber optic Fabry–Perot strain sensor, the potential multiplexing capability and the dynamic measurement range are improved simultaneously. At the same time, the measurement stability of the electrical scanning mirror system is improved by the self-referenced signal of the sensor structure.
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A compact fiber-optic flow velocity sensor based on a twin-core fiber Michelson Interferometer
IEEE Sensors Journal, 2008Co-Authors: Li-bo Yuan, Jun Yang, Zhihai LiuAbstract:A novel fiber-optic flow velocity sensor based on a twin-core fiber Michelson Interferometer has been proposed and demonstrated. The sensor only is a segment of twin-core fiber acting as cylinder cantilever beam. The force exerted on the cylinder by the slow flow speeds of order mm/s of the fluid with unknown velocity bends the fiber, which corresponds to the shift of the phase of the twin-core in-fiber integrated Michelson Interferometer.
Qiangzhou Rong - One of the best experts on this subject based on the ideXlab platform.
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fiber optic Michelson Interferometer fixed in a tilted tube for direction dependent ultrasonic detection
Optics and Lasers in Engineering, 2017Co-Authors: Tingting Gang, Xueguang Qiao, Zhihua Shao, Rongxin Tong, Qiangzhou RongAbstract:Abstract A fiber-optic Interferometer is proposed and demonstrated experimentally for ultrasonic detection. The sensor consists of a compact Michelson Interferometer (MI), which is fixed in a tilted-tube end-face (45°). Thin gold films are used for the reflective coatings of two arms and one of the interference arms is etched serving as the sensing arm. The spectral sideband filter technique is used to interrogate the continuous and pulse ultrasonic signals (with frequency of 300 KHz). Furthermore, because of the asymmetrical structure of the sensor, it presents strong direction-dependent ultrasonic sensitivity, such that the sensor can be considered a vector detector. The experimental results show that the sensor is highly sensitive to ultrasonic signals, and thus it can be a candidate for ultrasonic imaging of seismic physical models.
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in fiber quasi Michelson Interferometer for liquid level measurement with a core cladding modes fiber end face mirror
Optics and Lasers in Engineering, 2014Co-Authors: Qiangzhou Rong, Dingyi Feng, Xueguang Qiao, Ruohui Wang, Hao Sun, Zhongyao FengAbstract:Abstract An in-fiber quasi-Michelson Interferometer (IFQMI) working on reflection is proposed and experimentally demonstrated for liquid level measurement. The device consists of a short piece of small-core fiber (SCF) followed by a standard single-mode fiber (SMF) where its end-face is terminated by a thick silver film. A well-defined interference pattern is obtained as the result of the fiber-core mismatch and core-cladding modes interference. The proposed device with a 30 mm pigtail SMF at a wavelength of 1555 nm presents a water level sensitivity of −68.3 pm/mm. Besides, the proposed device can also discriminate the refractive index (RI) of liquid measured. The IFQMI with 50 mm-long SMF provides a high RI sensitivity of −1200.61 (pm/mm)/RIU.
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in fiber quasi Michelson Interferometer with a core cladding mode fiber end face mirror
Applied Optics, 2013Co-Authors: Qiangzhou Rong, Yanying Du, Dingyi Feng, Manli Hu, Xueguang Qiao, Ruohui Wang, Zhongyao FengAbstract:An in-fiber quasi-Michelson Interferometer working on reflection is proposed and experimentally demonstrated. The device consists of a short section of multimode fiber (MMF) followed by a single-mode fiber (SMF) whose end face is terminated by a thick silver film. The MMF excites cladding modes into downstream SMF via the mismatched-core splicing interface. The core–cladding modes are reflected back by the silver film and recoupled to the core of lead-in SMF through the MMF. A well-defined interference pattern is obtained as the result of core–cladding mode interference. A configuration with a 40 mm pigtail SMF at a wavelength of 1528 nm exhibits a water level sensitivity of −49.8 pm/mm and a liquid refractive index sensitivity of −574.6 (pm/mm)/RIU (refractive index unit). In addition, the selected dip provides a considered temperature sensitivity of −61.26 pm/°C and a high displacement sensitivity of −1018.6 pm/mm.
Changrui Liao - One of the best experts on this subject based on the ideXlab platform.
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intensity modulated refractive index sensor based on optical fiber Michelson Interferometer
Sensors and Actuators B-chemical, 2015Co-Authors: Jiangtao Zhou, Changrui Liao, Yiping Wang, Shen Liu, Guolu Yin, Bing Sun, Jun He, Zhengyong Li, Guanjun Wang, Xiaoyong ZhongAbstract:Abstract We demonstrated a refractive index (RI) sensor based on optical fiber Michelson Interferometer (MI), which was fabricated by splicing a section of thin core fiber (TCF) to a standard single mode fiber with a core offset. Experimentally, such a MI-based RI sensor with a core offset of 8 μm and a TCF length of 3 mm exhibits a high resolution of 4.9 × 10−6 RIU and sensitivity of −202.46 dB/RIU, which is two or three times higher than that of intensity-modulated RI sensors reported previously. In contrast, our MI-based RI sensor is insensitive to temperature, thus overcoming the cross-sensitivity problem between surrounding RI and temperature. Moreover, intensity modulation, rather than wavelength modulation, was used in the proposed MI-based RI sensor, and the sensor also has the advantages of compact size (8 mm), simple structure, easy fabrication, and good repeatability.
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intensity modulated refractive index sensor based on optical fiber Michelson Interferometer
Sensors and Actuators B-chemical, 2015Co-Authors: Jiangtao Zhou, Changrui Liao, Yiping Wang, Shen Liu, Xiaoyong Zhong, Guolu Yin, Bing Sun, Guanjun Wang, Jing ZhaoAbstract:a b s t r a c t We demonstrated a refractive index (RI) sensor based on optical fiber Michelson Interferometer (MI), which was fabricated by splicing a section of thin core fiber (TCF) to a standard single mode fiber with a core offset. Experimentally, such a MI-based RI sensor with a core offset of 8 m and a TCF length of 3 mm exhibits a high resolution of 4.9 × 10−6 RIU and sensitivity of −202.46 dB/RIU, which is two or three times higher than that of intensity-modulated RI sensors reported previously. In contrast, our MIbased RI sensor is insensitive to temperature, thus overcoming the cross-sensitivity problem between surrounding RI and temperature. Moreover, intensity modulation, rather than wavelength modulation, was used in the proposed MI-based RI sensor, and the sensor also has the advantages of compact size (8 mm), simple structure, easy fabrication, and good repeatability. © 2014 Published by Elsevier B.V.
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temperature insensitive refractive index sensor based on in fiber Michelson Interferometer
Sensors and Actuators B-chemical, 2014Co-Authors: Yiping Wang, Changrui Liao, Shen Liu, Jiangtao Zhou, Xiaoyong Zhong, Yingjie Liu, Kaiming Yang, Qiao Wang, Guolu YinAbstract:Abstract A novel intensity-modulated refractive index sensor based on an in-fiber Michelson Interferometer is demonstrated by splicing a section of thin core fiber between two standard single mode fibers. Such a refractive index sensor exhibits an ultrahigh sensitivity of −208.24 and 125.44 dB/RIU at the refractive index of 1.440 and 1.500, respectively. The refractive index sensor is insensitive to temperature and thus solves the cross-sensitivity problem between temperature and surrounding refractive index. Moreover, the promising RI sensor has the advantages of short size (less than 2 mm) and easy fabrication.
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fiber in line Michelson Interferometer tip sensor fabricated by femtosecond laser
IEEE Photonics Technology Letters, 2012Co-Authors: Changrui Liao, D N Wang, Min Wang, Minghong YangAbstract:A fiber in-line Michelson Interferometer tip sensor based on open micro-cavity, which is fabricated by femtosecond laser micromachining and the thin film coating technique, is proposed and demonstrated. When used in refractive index sensing, such an Interferometer operates in a reflection mode of detection, and exhibits a compact sensor head, good mechanical reliability, wide operation range, and high sensitivity of 975 nm/refractive index unit at a refractive index value of 1.484.