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Study of Temporal Thermal Response of Microfiber Bragg Grating

Photonic Sensors 2021年第4期11卷 387-391页

作者： Changrui LIAO Tianhang YANG Jinli HAN Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Things College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors Shenzhen UniversityShenzhen 518060China

fiber Bragg grating has been successfully fabricated in the silica microfiber by the use of femtosecond laser point-by-point *** thermal response of the fabricated silica microfiber Bragg grating has been measured by the use of the CO_(2) laser thermal excitation method,and the result shows that the time constant of the microfiber Bragg grating is reduced by an order of magnitude compared with the traditional single-mode fiber Bragg grating and the measured time constant is〜21 ms.

关键词： fiber optics sensors fiber optics and optical communications fiber optics components

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A high performance compact vibration sensor based on fiber Bragg grating

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Chinese optics Letters 2014年第A01期12卷 45-46页

作者：张晚磊张发祥李淑娟王蒙王路杰宋志强孙志慧祁海峰王昌彭纲定 Shandong Provincial Key Laboratory of Optical fiber Sensing Technologies Jinan 250014 China Laser Institute of Shandong Academy of Sciences Jinan 250014 China School of Electrical Engineering and Telecommunications University of New South Wales Sydney 2052 Australia

A high-performance compact vibration sensor based on fiber Bragg grating （FBG） is designed. The acceleration sensitivity of the FBG vibration sensor is measured to be larger than 30 pm/g. From 10 Hz to 250 Hz, a quite flat frequency-response curve can be obtained with additional damping, which suppresses the resonance peak effectively. A phase-generated carrier （PGC） demodulation technique realized by compact reconfigurable input and output （RIO） system is applied in our sensing system.

关键词： 060.2370 fiber optics sensors 060.3735 fiber Bragg gratings 060.2340 fiber optics components 120.7280 Vibration analysis

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Uniformly high-speed semi-open loop polarization control and PMD suppression

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Chinese optics Letters 2020年第5期18卷 1-5页

作者： Boehen Wang Zhengyong Li Key Laboratory of Luminescence and Optical Information Technology Ministry of EducationBeijing Jiaotong UniversityBeijing 100044China

We propose and demonstrate a novel scheme of semi-open-loop polarization control(SOL-PC), which controls the state of polarization(SOP) with high accuracy and uniform high speed. For any desired SOP, we first adjust the initial SOP using open-loop control(OLC) based on the matrix model of a three-unit piezoelectric polarization controller, and quickly move it close to the objective one. Then closed-loop control(CLC) is performed to reduce the error and reach precisely the desired SOP. The response time is three orders faster than that of the present closed-loop polarization control, while the average deviation is on par with it. Finally, the SOL-PC system is successfully applied to realize the suppression of the polarization mode dispersion(PMD) effect and reduce the first-order PMD to near zero. Due to its perfect performance, the SOL-PC energizes the present polarization control to pursue an ideal product that can meet the future requirements in ultrafast optical transmission and quantum communication.

关键词： polarization control polarization mode dispersion fiber optics components coherent comm unications

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Multi-TBaud Optical Coding Based on Superluminal Space-to-Time Mapping in Long Period Gratings

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optics and Photonics Journal 2013年第2期3卷 126-130页

作者： Reza Ashrafi Ming Li José Azana Institut National de la Recherche Scientifique-Energie Matériaux et TélécommunicationsMontréalQuébecCanada

A novel time-domain ultra-fast pulse shaping approach for multi-TBaud serial optical communication signal (e.g. QPSK and 16-QAM) generation based on the first-order Born approximation in feasible all-fiber long-period... 详细信息

关键词： Pulse Shaping fiber optics components All-optical Devices Ultra-fast Processing

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