The Study of Full Light Speech Signal Collection System

The demodulation character of 3×3 optic fiber couplers is analyzed, and the application in the coherent communication system and speech signal collection is pointed out in the paper. By the experiment, the feasibility of speech signal collection system by the way of the all light is verified.     

光纤射频滤波网络与最佳陷波条件的研究

研究了利用光纤网络实现的射频滤波技术，讨论了几种基本单元结构的冲击响应函数与最佳滤波条件。给出了各单元实现理想陷波的参量取值范围，发展并验证了为获得最佳陷波的耦合器系数—损耗补偿方法。实验表明这一方法是简便有效的，并与理论分析符合得很好。     

光纤熔锥耦合器的声光调制特性

对光纤熔锥方向耦合器的声光强度调特性进行了实验研究,得到了工作波长为1310nm、声波频率为20.19kHz,电驱动功率为2.6mW,插入损耗为0.5dB,调制深度为64％的声光强度调制特性。     

All Fiber Optical Velocity Interferometer Research

In this paper,we use a fiber mode coupling method to analyse a fiber optical velocity interferometer system for any reflector and use it to measure low velocity impact specimens with diffuse reflecting surface. The experiment results agree with theoritcal analysises fairly and the profile of velocity vs time is first obtained in the experiment.     

Enhanced electrochemical performance of Li1.2Ni0.13Co0.13Mn0.54O2 composited with Ti3C2Tx MXene nanosheets

Journal of Solid State Electrochemistry - Li1.2Ni0.13Co0.13Mn0.54O2/Ti3C2Tx (LMR/TC) composite materials have been synthesized through mixing LMR particles with TC nanosheets. SEM result shows that...     

The Experimental Study on Acousto-optic Modulation Based on Single-mode Fiber Fused Coupler

In-line acoustic-optic (AO) modulation experiments were demonstrated based on the acoustic-optic effect in optical fiber fused taper couplers.About 73%,64%,and 61% modulation have been achieved at frequencies of 0.169 MHz,0.367 MHz and 0.521 MHz with an electrical driving power less than 10 mW,respectively.     

Preparation of Reduced Graphene Oxide/MnO Composite and Its Electromagnetic Wave Absorption Performance

The composite containing reduced graphene oxide and MnO nanoparticles (RGO/MnO) has been prepared via a one step pyrolysis method. The MnO nanoparticles were uniformly dispersed on the surface of RGO nanosheets forming MnO/RGO composite. The composite displays a maximum absorption of ‒38.9 dB at 13.5 GHz and the bandwidth of reflection loss corresponding to –10 dB can reach 4.9 GHz (from 11.5 to 16.4 GHz) with a coating layer thickness of only 2 mm. Therefore, the obtained RGO/MnO composite a perfect lightweight and high-performance electromagnetic wave absorbent.

     

All Fiber Optical Velocity Interferometer Research

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The Experimental Study on Acousto-optic Modulation Based on Single-mode Fiber Fused Coupler

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