The Experts below are selected from a list of 223185 Experts worldwide ranked by ideXlab platform
Yong Liu - One of the best experts on this subject based on the ideXlab platform.
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self calibrating frequency Response Measurement of high speed electro optic phase modulators based on photonic down conversion sampling and low frequency detection
2019 Asia Communications and Photonics Conference (ACP), 2019Co-Authors: Yujia Zhang, Shang-jian Zhang, Zhiyao Zhang, Lingjie Zhang, Zhen Zeng, Yong LiuAbstract:We propose an approach to measuring frequency Response of phase modulators (PMs) based on photonic down-conversion sampling and low-frequency detection. In the experiment, frequency Response of a 20 Gb/s PM is measured with a resolution of 96.9 MHz.
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hyperfine magnitude Response Measurement of optical bandpass filters based on electro optic two tone sweeping and fixed low frequency detection
2019 Asia Communications and Photonics Conference (ACP), 2019Co-Authors: Yaowen Zhang, Shang-jian Zhang, Ya-li Zhang, Zhiyao Zhang, Fei Yuan, Yong LiuAbstract:We propose an approach to realizing hyperfine magnitude Response Measurement of optical bandpass filters. In the experiment, magnitude Response of a high-Q fiber Fabry-Perot interferometer is measured with a resolution of 100 kHz.
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frequency Response Measurement of high speed electro optic phase modulators via a single scan based on low speed photonic sampling and low frequency detection
Optics Express, 2019Co-Authors: Yujia Zhang, Shang-jian Zhang, Zhiyao Zhang, Lingjie Zhang, Zhen Zeng, Yong LiuAbstract:An approach to measuring frequency Response of high-speed electro-optic phase modulators via a single scan is proposed and experimentally demonstrated. This method employs low-speed photonic sampling to transfer the Response information at any high frequency to a fixed low-frequency duplicate in the first Nyquist frequency range by setting the microwave frequency sweeping step equal to the repetition rate of the mode-locked laser. Through low-frequency detection and analysis in the electrical domain, the relative frequency Response can be directly calculated from the relative intensity between the low-frequency duplicate and the direct current component without calibration of the photodetector Response. In the experiment, the relative frequency Responses (i.e., the S21 curve) of two 20 Gb/s LiNbO3-based electro-optic phase modulators and two 40 Gb/s samples are measured with a resolution of 96.9 MHz by using the proposed method, where the Measurement results fit in with those obtained by using the conventional optical spectrum analysis method. The frequency Measurement resolution can be further improved by using a mode-locked laser with a lower repetition rate.
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intrinsic phase Response retrieval of notch in reflection spectrum of a phase shifted fiber bragg grating based on magnitude Response Measurement
Semiconductor Lasers and Applications VIII, 2018Co-Authors: Fei Yuan, Shang-jian Zhang, Zhiyao Zhang, Yong LiuAbstract:An approach to retrieving intrinsic phase Response of optical filters from magnitude Response only Measurement is proposed and demonstrated. Phase retrieval is based on the fact that the intrinsic phase Response of an optical filter with a minimum phase Response has a unique relationship with its magnitude Response. A phase retrieval algorithm based on fast Fourier transform is proposed. In the experiment, the intrinsic phase Response of notch in the reflection spectrum of a phase-shifted fiber Bragg grating is successfully retrieved from the measured magnitude Response, which is free of the influence of fiber pigtail in the Measurement setup.
Shilong Pan - One of the best experts on this subject based on the ideXlab platform.
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large dynamic frequency Response Measurement for broadband electro optic phase modulators
IEEE Photonics Technology Letters, 2019Co-Authors: Yuqing Heng, Min Xue, Wei Chen, Shunli Han, Jiaqing Liu, Shilong PanAbstract:A novel method for characterizing the frequency Responses of broadband electro-optic phase modulators (PMs) by employing stimulated Brillouin scattering (SBS) is proposed and experimentally demonstrated. In the proposed method, the SBS amplifies the +1st-order sideband and attenuates the −1st-order sideband of the phase-modulated signal from a PM under test. Thereby, the phase-modulated signal is converted into an optical single-sideband modulation signal. After square-law photodetection, the overall frequency Responses are obtained. Removing the frequency Responses of the SBS gain and the photodetector from the overall Responses, the Responses of the PM are thus achieved. Benefitting from the amplification of the SBS, the proposed method possesses a large dynamic range. Sub-Hz resolution and broadband Measurement range are also achievable. A commercial broadband PM is experimentally characterized from 10 MHz to 50 GHz with a resolution of 5 MHz. According to the amplification of the SBS, the dynamic range is enhanced by 17.74 dB. The Measurement result is verified by the conventional method utilizing optical spectrum analysis.
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Measurement of optical magnitude Response based on double sideband modulation
Optics Letters, 2014Co-Authors: Ting Qing, Min Xue, Menghao Huang, Shilong PanAbstract:A novel approach to perform high-resolution optical magnitude Response Measurements, using optical double-sideband (ODSB) modulation, is proposed and experimentally demonstrated. As compared with a conventional optical single-sideband modulation-based optical magnitude Response Measurement, the proposed method based on ODSB modulation features not only simple configuration and doubled Measurement range, but also immunity to modulation nonlinearity. A proof-of-concept experiment is carried out. The magnitude Response of a fiber Bragg grating (FBG), in the range of 40 GHz, was measured with a resolution of 10 MHz, by using a 20 GHz microwave signal source.
Shang-jian Zhang - One of the best experts on this subject based on the ideXlab platform.
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self calibrating frequency Response Measurement of high speed electro optic phase modulators based on photonic down conversion sampling and low frequency detection
2019 Asia Communications and Photonics Conference (ACP), 2019Co-Authors: Yujia Zhang, Shang-jian Zhang, Zhiyao Zhang, Lingjie Zhang, Zhen Zeng, Yong LiuAbstract:We propose an approach to measuring frequency Response of phase modulators (PMs) based on photonic down-conversion sampling and low-frequency detection. In the experiment, frequency Response of a 20 Gb/s PM is measured with a resolution of 96.9 MHz.
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hyperfine magnitude Response Measurement of optical bandpass filters based on electro optic two tone sweeping and fixed low frequency detection
2019 Asia Communications and Photonics Conference (ACP), 2019Co-Authors: Yaowen Zhang, Shang-jian Zhang, Ya-li Zhang, Zhiyao Zhang, Fei Yuan, Yong LiuAbstract:We propose an approach to realizing hyperfine magnitude Response Measurement of optical bandpass filters. In the experiment, magnitude Response of a high-Q fiber Fabry-Perot interferometer is measured with a resolution of 100 kHz.
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frequency Response Measurement of high speed electro optic phase modulators via a single scan based on low speed photonic sampling and low frequency detection
Optics Express, 2019Co-Authors: Yujia Zhang, Shang-jian Zhang, Zhiyao Zhang, Lingjie Zhang, Zhen Zeng, Yong LiuAbstract:An approach to measuring frequency Response of high-speed electro-optic phase modulators via a single scan is proposed and experimentally demonstrated. This method employs low-speed photonic sampling to transfer the Response information at any high frequency to a fixed low-frequency duplicate in the first Nyquist frequency range by setting the microwave frequency sweeping step equal to the repetition rate of the mode-locked laser. Through low-frequency detection and analysis in the electrical domain, the relative frequency Response can be directly calculated from the relative intensity between the low-frequency duplicate and the direct current component without calibration of the photodetector Response. In the experiment, the relative frequency Responses (i.e., the S21 curve) of two 20 Gb/s LiNbO3-based electro-optic phase modulators and two 40 Gb/s samples are measured with a resolution of 96.9 MHz by using the proposed method, where the Measurement results fit in with those obtained by using the conventional optical spectrum analysis method. The frequency Measurement resolution can be further improved by using a mode-locked laser with a lower repetition rate.
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intrinsic phase Response retrieval of notch in reflection spectrum of a phase shifted fiber bragg grating based on magnitude Response Measurement
Semiconductor Lasers and Applications VIII, 2018Co-Authors: Fei Yuan, Shang-jian Zhang, Zhiyao Zhang, Yong LiuAbstract:An approach to retrieving intrinsic phase Response of optical filters from magnitude Response only Measurement is proposed and demonstrated. Phase retrieval is based on the fact that the intrinsic phase Response of an optical filter with a minimum phase Response has a unique relationship with its magnitude Response. A phase retrieval algorithm based on fast Fourier transform is proposed. In the experiment, the intrinsic phase Response of notch in the reflection spectrum of a phase-shifted fiber Bragg grating is successfully retrieved from the measured magnitude Response, which is free of the influence of fiber pigtail in the Measurement setup.
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Self-referenced heterodyne method for measuring frequency Response of optical phase modulators
2016 25th Wireless and Optical Communication Conference (WOCC), 2016Co-Authors: Heng Wang, Shang-jian Zhang, Ya-li ZhangAbstract:A self-referenced heterodyne method is proposed and demonstrated for frequency Response Measurement of high-speed electro-optic phase modulators (PMs), which avoids the need for correcting the responsivity fluctuation of the assistant photodetector and extends double measuring frequency range through setting a specific frequency relationship of two driving electrical signals.
Yujia Zhang - One of the best experts on this subject based on the ideXlab platform.
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self calibrating frequency Response Measurement of high speed electro optic phase modulators based on photonic down conversion sampling and low frequency detection
2019 Asia Communications and Photonics Conference (ACP), 2019Co-Authors: Yujia Zhang, Shang-jian Zhang, Zhiyao Zhang, Lingjie Zhang, Zhen Zeng, Yong LiuAbstract:We propose an approach to measuring frequency Response of phase modulators (PMs) based on photonic down-conversion sampling and low-frequency detection. In the experiment, frequency Response of a 20 Gb/s PM is measured with a resolution of 96.9 MHz.
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frequency Response Measurement of high speed electro optic phase modulators via a single scan based on low speed photonic sampling and low frequency detection
Optics Express, 2019Co-Authors: Yujia Zhang, Shang-jian Zhang, Zhiyao Zhang, Lingjie Zhang, Zhen Zeng, Yong LiuAbstract:An approach to measuring frequency Response of high-speed electro-optic phase modulators via a single scan is proposed and experimentally demonstrated. This method employs low-speed photonic sampling to transfer the Response information at any high frequency to a fixed low-frequency duplicate in the first Nyquist frequency range by setting the microwave frequency sweeping step equal to the repetition rate of the mode-locked laser. Through low-frequency detection and analysis in the electrical domain, the relative frequency Response can be directly calculated from the relative intensity between the low-frequency duplicate and the direct current component without calibration of the photodetector Response. In the experiment, the relative frequency Responses (i.e., the S21 curve) of two 20 Gb/s LiNbO3-based electro-optic phase modulators and two 40 Gb/s samples are measured with a resolution of 96.9 MHz by using the proposed method, where the Measurement results fit in with those obtained by using the conventional optical spectrum analysis method. The frequency Measurement resolution can be further improved by using a mode-locked laser with a lower repetition rate.
Zhiyao Zhang - One of the best experts on this subject based on the ideXlab platform.
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self calibrating frequency Response Measurement of high speed electro optic phase modulators based on photonic down conversion sampling and low frequency detection
2019 Asia Communications and Photonics Conference (ACP), 2019Co-Authors: Yujia Zhang, Shang-jian Zhang, Zhiyao Zhang, Lingjie Zhang, Zhen Zeng, Yong LiuAbstract:We propose an approach to measuring frequency Response of phase modulators (PMs) based on photonic down-conversion sampling and low-frequency detection. In the experiment, frequency Response of a 20 Gb/s PM is measured with a resolution of 96.9 MHz.
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hyperfine magnitude Response Measurement of optical bandpass filters based on electro optic two tone sweeping and fixed low frequency detection
2019 Asia Communications and Photonics Conference (ACP), 2019Co-Authors: Yaowen Zhang, Shang-jian Zhang, Ya-li Zhang, Zhiyao Zhang, Fei Yuan, Yong LiuAbstract:We propose an approach to realizing hyperfine magnitude Response Measurement of optical bandpass filters. In the experiment, magnitude Response of a high-Q fiber Fabry-Perot interferometer is measured with a resolution of 100 kHz.
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frequency Response Measurement of high speed electro optic phase modulators via a single scan based on low speed photonic sampling and low frequency detection
Optics Express, 2019Co-Authors: Yujia Zhang, Shang-jian Zhang, Zhiyao Zhang, Lingjie Zhang, Zhen Zeng, Yong LiuAbstract:An approach to measuring frequency Response of high-speed electro-optic phase modulators via a single scan is proposed and experimentally demonstrated. This method employs low-speed photonic sampling to transfer the Response information at any high frequency to a fixed low-frequency duplicate in the first Nyquist frequency range by setting the microwave frequency sweeping step equal to the repetition rate of the mode-locked laser. Through low-frequency detection and analysis in the electrical domain, the relative frequency Response can be directly calculated from the relative intensity between the low-frequency duplicate and the direct current component without calibration of the photodetector Response. In the experiment, the relative frequency Responses (i.e., the S21 curve) of two 20 Gb/s LiNbO3-based electro-optic phase modulators and two 40 Gb/s samples are measured with a resolution of 96.9 MHz by using the proposed method, where the Measurement results fit in with those obtained by using the conventional optical spectrum analysis method. The frequency Measurement resolution can be further improved by using a mode-locked laser with a lower repetition rate.
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intrinsic phase Response retrieval of notch in reflection spectrum of a phase shifted fiber bragg grating based on magnitude Response Measurement
Semiconductor Lasers and Applications VIII, 2018Co-Authors: Fei Yuan, Shang-jian Zhang, Zhiyao Zhang, Yong LiuAbstract:An approach to retrieving intrinsic phase Response of optical filters from magnitude Response only Measurement is proposed and demonstrated. Phase retrieval is based on the fact that the intrinsic phase Response of an optical filter with a minimum phase Response has a unique relationship with its magnitude Response. A phase retrieval algorithm based on fast Fourier transform is proposed. In the experiment, the intrinsic phase Response of notch in the reflection spectrum of a phase-shifted fiber Bragg grating is successfully retrieved from the measured magnitude Response, which is free of the influence of fiber pigtail in the Measurement setup.