The Experts below are selected from a list of 16407 Experts worldwide ranked by ideXlab platform
Shu Namiki - One of the best experts on this subject based on the ideXlab platform.
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Parametric tunable Dispersion Compensation for DPSK signals
2011Co-Authors: Ken Tanizawa, Junya Kurumida, Masanori Takahashi, Takeshi Yagi, Shu NamikiAbstract:We report parametric tunable Dispersion Compensation in 43-Gbit/s RZ-DPSK transmission over 126-km DSF. Tunable optical Dispersion Compensation is successfully achieved with a low power penalty of less than 1 dB.
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Tunable Dispersion Compensation Using Parametric Processes
OFC NFOEC 2008 - 2008 Conference on Optical Fiber Communication National Fiber Optic Engineers Conference, 2008Co-Authors: Shu NamikiAbstract:This talk will discuss in detail the principle and potential applications of the intrinsically ultra-fast, wide-band and -range tunable Dispersion Compensation realized through parametric wavelength conversion in conjunction with dispersive fibers.
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Parametric Tunable Dispersion Compensation
2007Co-Authors: Shu NamikiAbstract:An intrinsically ultra-fast, wide-band and -range tunable Dispersion Compensation is realized through parametric wavelength conversion in conjunction with Dispersion slope fibers. The proposed scheme produces two orders of magnitude larger bandwidth-Dispersion product than conventional ones.
David D. Sampson - One of the best experts on this subject based on the ideXlab platform.
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Real-time Dispersion Compensation in scanning interferometry.
Optics letters, 2002Co-Authors: E.d.j. Smith, Andrei V. Zvyagin, David D. SampsonAbstract:We propose and demonstrate a method of real-time Dispersion Compensation suitable for scanning interferometry and optical coherence tomography. Static grating tilt in a scanning frequency-domain optical delay line is shown to produce Dispersion that is linearly proportional to scan position, and we use this property to achieve depth-dependent Dispersion Compensation during an interferometric scan through a dispersive sample.
E.d.j. Smith - One of the best experts on this subject based on the ideXlab platform.
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Real-time Dispersion Compensation in scanning interferometry.
Optics letters, 2002Co-Authors: E.d.j. Smith, Andrei V. Zvyagin, David D. SampsonAbstract:We propose and demonstrate a method of real-time Dispersion Compensation suitable for scanning interferometry and optical coherence tomography. Static grating tilt in a scanning frequency-domain optical delay line is shown to produce Dispersion that is linearly proportional to scan position, and we use this property to achieve depth-dependent Dispersion Compensation during an interferometric scan through a dispersive sample.
Xiangzhao Wang - One of the best experts on this subject based on the ideXlab platform.
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an optimized depth resolved Dispersion Compensation method in optical coherent tomography signal processing
IEEE International Conference on Photonics, 2021Co-Authors: Xi Zhang, Nan Nan, Xiangzhao WangAbstract:An optimized depth-resolved Dispersion Compensation method for achieving better Dispersion Compensation effect is presented in optical coherence tomography signal processing. When performing depth-resolved Dispersion Compensation, it is necessary to use a rectangular window function to intercept the interference signals at different depths of the sample from the A-line signal before FFT. Windowed FFT will cause errors in phase extraction, which will lead to inaccurate Dispersion coefficient. Herein, the rectangular window function needs to be optimized. The phase is extracted after FFT of the interference signal obtained by the primary rectangular window. According to the functional relationship between the phase and the wave number in the presence of Dispersion, the obtained phase is fitted to the quadratic polynomial by the least square method, and the standard error of the fitted quadratic polynomial is used as the criterion. Constantly changed the width and center position of the rectangular window to obtain the smallest standard error. The smallest standard error corresponds to the optimized rectangular window, which is used to intercept the signal and perform FFT to obtain a phase close to the true value. Therefore, the Dispersion Compensation coefficients of the OCT system at different depths are accurately extracted. It is verified by simulation and experiment that this method can achieve better Dispersion Compensation effect.
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Depth-dependent Dispersion Compensation for full-depth OCT image.
Optics express, 2017Co-Authors: Pan Liuhua, Nan Nan, Xiangzhao Wang, Xiangyang Zhang, Chen Yan, Xuan WangAbstract:A depth-dependent Dispersion Compensation algorithm for enhancing the image quality of the Fourier-domain optical coherence tomography (OCT) is presented. The Dispersion related with depth in the sample is considered. Using the iterative method, an analytical formula for compensating the depth-dependent Dispersion in the sample is obtained. We apply depth-dependent Dispersion Compensation algorithm to process the phantom images and in vivo images. Using sharpness metric based on variation coefficient to compare the results processed with different Dispersion Compensation algorithms, we find that the depth-dependent Dispersion Compensation algorithm can improve image quality at full depth.
F. Matera - One of the best experts on this subject based on the ideXlab platform.
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Numerical and experimental comparison of Dispersion Compensation techniques on different fibers
IEEE Photonics Technology Letters, 2002Co-Authors: A. Pizzinat, A. Schiffini, Francesco Alberti, A. Paoletti, D. Caccioli, P. Griggio, Paolo Minzioni, F. MateraAbstract:The authors carry out a numerical and experimental comparison between three different techniques for chromatic Dispersion Compensation on a terrestrial 40-Gb/s system. They are: periodic Dispersion Compensation at the amplifier places; the same but with initial prechirp; and Dispersion Compensation all at the end of the system by means of highly dispersed pulses. Numerical results are consistent with experimental ones and suggest the most convenient Compensation technique with respect to fiber type (G.652 or G.655) and pulsewidth (3-10 ps).