Dr. Haili Zhao Profile

Dr. Haili Zhao

at Changchun Univ of Science and Technology

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Publications (7)

Proceedings Article | 2 December 2020 Paper

All stokes vector polarization spectral imaging based on the focal plane method

Hualong Zhang, Haili Zhao, Xiaoman Wang, Lin Shi, Peng Liu

Proceedings Volume 11717, 117172U (2020) https://doi.org/10.1117/12.2587388

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Proceedings Article | 2 December 2020 Paper

Design of PPM modulation and demodulation module in optical communication

Guxiang Zhang, Xiaoman Wang, Haili Zhao

Proceedings Volume 11717, 117170T (2020) https://doi.org/10.1117/12.2585278

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Modulation and demodulation is an important key technology in optical communication. The design of modulation and demodulation will directly affect the transmission quality of the whole system. Therefore, the design of modulation and demodulation system is of great significance to the application of optical communication. In this paper, the PPM modulation and demodulation is designed as an independent module in FPGA, which is convenient for people to use. Through the oscilloscope, FPGA development board, PC hardware system and Quartus II, serial assistant, mdelsim software system to verify the design of the modulation and demodulation module function. PC serial port is used to send unmodulated digital signal to FPGA development board. FPGA modulates the data received by serial port. The modulated signal is divided into two channels. One channel is sent to PPM demodulation module. The demodulated signal and the other modulated signal are sent to PC through serial port. The oscilloscope is used to capture the sending and receiving pin signals. By comparing the waveform and serial port of the oscilloscope, two channels of waveform are compared Hand data to verify the design of the module. The main working process of PPM modulation module is to collect the original digital signal by sampling clock, and then to modulate it into PPM signal after buffering, encoding, storing and shifting. Ppm demodulation module collects PPM signal by sampling clock, caches, decodes, registers and shifts output, and finally demodulates the original signal. Through Modelsim simulation and oscilloscope hardware platform experiment, it shows that the PPM modulation and demodulation module designed in this paper has strong antiinterference ability, low bit error rate, convenient and flexible, and has good engineering application value. It realizes higher communication rate in optical communication system and improves the reliability of transmission system, which is very important for optical communication.

Proceedings Article | 17 May 2019 Paper

Design of high precision digital phase detector in LDDM system

Qinnan Liu, Haili Zhao, Ge Wu, Peng Liu, Zeliang Yan

Proceedings Volume 11170, 111701T (2019) https://doi.org/10.1117/12.2533548

KEYWORDS: Field programmable gate arrays, Signal detection, Filtering (signal processing), Electronic filtering, MATLAB, Digital filtering, Signal processing

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Proceedings Article | 17 May 2019 Paper

Research on real-time detection system of underwater polarization imaging based on focusing plane method

Zeliang Yan, Haili Zhao, Qinnan Liu, Peng Liu

Proceedings Volume 11170, 1117034 (2019) https://doi.org/10.1117/12.2533886

KEYWORDS: Polarization, Imaging systems, Image fusion, Target detection, Liquid crystals, Cameras, Image processing, Submerged target detection, Underwater imaging, Optical filters

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Proceedings Article | 11 February 2005 Paper

Study on simulating high precision beaconing light source modulated by liquid crystal

Huilin Jiang, Haili Zhao, Fang Qi

Proceedings Volume 5625, (2005) https://doi.org/10.1117/12.574550

KEYWORDS: Liquid crystals, Modulation, Molecules, Light sources, Optical communications, Telecommunications, Atmospheric optics, Refractive index, Device simulation, Modulators

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Proceedings Article | 20 January 2005 Paper

Research on intelligent detection and processing technology of laser pulse

Haili Zhao, Huilin Jiang

Proceedings Volume 5633, (2005) https://doi.org/10.1117/12.574547

KEYWORDS: Signal detection, Laser applications, Pulsed laser operation, Signal processing, Interference (communication), Sensors, Optical amplifiers, Laser systems engineering, Telecommunications, Laser processing

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Proceedings Article | 20 September 2002 Paper

Applications of wide-angle photoelectric sensor in the laser-atmosphere communication system

Lu Song, Jingyi Yang, Ye Wang, Haili Zhao

Proceedings Volume 4919, (2002) https://doi.org/10.1117/12.471886

KEYWORDS: Telecommunications, Sensors, Signal detection, Laser systems engineering, Semiconductor lasers, Data communications, Control systems, Optical filters, Atmospheric sensing, Electronics

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Showing 5 of 7 publications

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