Dr. Howell Zhao Profile

Dr. Howell Zhao

at Bandweaver Technologies Co Ltd

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Publications (3)

Proceedings Article | 23 April 2017 Paper

Pulse compression phase sensitive optical time domain reflectometer with sub-meter resolution

Bin Lu, Zhaoyong Wang, Hanrong Zheng, Qing Ye, Ronghui Qu, Howell Zhao, Haiwen Cai

Proceedings Volume 10323, 103230O (2017) https://doi.org/10.1117/12.2264980

KEYWORDS: Spatial resolution, Reflectometry, Signal to noise ratio, Frequency modulation, Signal detection, Ferroelectric materials, Data acquisition, Modulation, Bragg cells, Digital signal processing

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Proceedings Article | 23 April 2017 Paper

Novel railway-subgrade vibration monitoring technology using phase-sensitive OTDR

Zhaoyong Wang, Bin Lu, Hanrong Zheng, Qing Ye, Zhengqing Pan, Haiwen Cai, Ronghui Qu, Zujie Fang, Howell Zhao

Proceedings Volume 10323, 103237G (2017) https://doi.org/10.1117/12.2265169

KEYWORDS: Safety, Fiber optics sensors, Reflectometry, Signal processing, Signal detection, Interference (communication), Optical amplifiers, Bragg cells, Knowledge management, Signal to noise ratio

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Proceedings Article | 2 June 2014 Paper

Mitigation of polarization fading in BOTDR sensors by using optical pulses with orthogonal polarizations

Yulong Cao, Qing Ye, Zhengqing Pan, Haiwen Cai, Ronghui Qu, Zujie Fang, Hao Zhao

Proceedings Volume 9157, 915764 (2014) https://doi.org/10.1117/12.2059283

KEYWORDS: Polarization, Optical fibers, Sensors, Signal to noise ratio, Picosecond phenomena, Signal detection, Scattering, Mach-Zehnder interferometers, Beam splitters, Birefringence

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