针对空间辐照带来的光功率衰减和卫星轨道周期带来的周期性温变效应,基于光子晶体光纤单一材料特点带来的抗辐照和弱温度敏感特性,提出开展空间用高精度光子晶体光纤陀螺技术研究。通过设计实芯光子晶体光纤结构,完成损耗<1.5 d B/k...针对空间辐照带来的光功率衰减和卫星轨道周期带来的周期性温变效应,基于光子晶体光纤单一材料特点带来的抗辐照和弱温度敏感特性,提出开展空间用高精度光子晶体光纤陀螺技术研究。通过设计实芯光子晶体光纤结构,完成损耗<1.5 d B/km、偏振串音<-24 d B/km和直径135μm的光子晶体光纤技术验证,并采用八极对称绕制技术完成3800 m光子晶体光纤环的绕制及性能测试,实现零偏稳定性优于0.001°/h、随机游走系数优于0.00016°√h的技术指标。同时结合空间应用的实际需求,开展了可靠性试验,并完成3斜装构形光子晶体光纤陀螺组件的研制,并于2020年12月22日发射入轨,评估精度与地面测试结果相当,产品运行稳定,性能优异。展开更多
High-precision fiber Bragg grating se nsor demodulation instrument with wide-range dynamic scanning can effectivel y improve the measuring range of the optical fiber grating sensor.Ethernet com munication module is an...High-precision fiber Bragg grating se nsor demodulation instrument with wide-range dynamic scanning can effectivel y improve the measuring range of the optical fiber grating sensor.Ethernet com munication module is an extremely important part of the high-precision grating sensor demodulation device.Network interface based on Ethernet control chip D M9000A is used to send and receive the Bragg grating sensing pulse.The network transformer YL18-2050S is used to convert and filter the pulse from network.The transmitting and receiving program of grating demodulation,hardware circuit of Ethernet transmission interface are designed.The experimental results show that the network interface can achieve accurate and real-time transmissi on of the grating sensing information at high speed.展开更多
A tunable single-longitudinal mode erbium-doped fiber ring laser based on stepper motor and closed loop control is proposed and demonstrated. The system consists of an erbium-doped fiber （EDF）, a tunable fiber Bragg...A tunable single-longitudinal mode erbium-doped fiber ring laser based on stepper motor and closed loop control is proposed and demonstrated. The system consists of an erbium-doped fiber （EDF）, a tunable fiber Bragg grating （FBG） filter and a wavelength detector. The characteristics of output laser, such as output power, power stability and 3-dB linewidth, are investigated in the operation range of I 531-1 569 nm. The repeated experimental results of the fiber laser show that the 3-dB linewidth is less than 17 ps, the side-mode suppression ratio （SMSR） is up to 60 dB, the outout Dower is up to 1.37 dBm. and the Dower variation is less than 0.61 dR展开更多
A novel fiber Bragg grating （FBG） rain gauge is proposed in this paper to achieve high precision rainfall measurement. One core sensitive FBG, a temperature compensation FBG and a mechanical transition system constr...A novel fiber Bragg grating （FBG） rain gauge is proposed in this paper to achieve high precision rainfall measurement. One core sensitive FBG, a temperature compensation FBG and a mechanical transition system construct this novel FBG rain gauge. Sensing principle of this FBG rain gauge is explained in detail, and its theoretical calculation model is also established, which shows that the relationship between center wavelength of sensitive FBG and external rainfall has very good linearity. To verify its detection performance, the calibration experiment on one prototype of this FBG rain gauge is carried out. After experiment data analysis, the detection precision of this FBG rain gauge is 15.4/.tm which is almost two orders of magnitude higher than that of the existing rainfall measurement device. The experimental data confirm that this FBG rain gauge can achieve rainfall measurement with high precision.展开更多
文摘针对空间辐照带来的光功率衰减和卫星轨道周期带来的周期性温变效应,基于光子晶体光纤单一材料特点带来的抗辐照和弱温度敏感特性,提出开展空间用高精度光子晶体光纤陀螺技术研究。通过设计实芯光子晶体光纤结构,完成损耗<1.5 d B/km、偏振串音<-24 d B/km和直径135μm的光子晶体光纤技术验证,并采用八极对称绕制技术完成3800 m光子晶体光纤环的绕制及性能测试,实现零偏稳定性优于0.001°/h、随机游走系数优于0.00016°√h的技术指标。同时结合空间应用的实际需求,开展了可靠性试验,并完成3斜装构形光子晶体光纤陀螺组件的研制,并于2020年12月22日发射入轨,评估精度与地面测试结果相当,产品运行稳定,性能优异。
文摘High-precision fiber Bragg grating se nsor demodulation instrument with wide-range dynamic scanning can effectivel y improve the measuring range of the optical fiber grating sensor.Ethernet com munication module is an extremely important part of the high-precision grating sensor demodulation device.Network interface based on Ethernet control chip D M9000A is used to send and receive the Bragg grating sensing pulse.The network transformer YL18-2050S is used to convert and filter the pulse from network.The transmitting and receiving program of grating demodulation,hardware circuit of Ethernet transmission interface are designed.The experimental results show that the network interface can achieve accurate and real-time transmissi on of the grating sensing information at high speed.
基金supported by the National Natural Science Foundation of China(No.61205014)the Natural Science Foundation of Shandong Province(No.ZR2012FL21)+3 种基金the Science&Technology Development Program of Shandong Province(No.2011YD01078)the Project of Shandong Provincial Higher Educational Science and Technology Program of China(No.J12LJ02)the Precision Instruments Upgrading Project Fund of Shandong Province(No.2012SJGZ06)the Doctoral Foundation of Shandong Province(No.BS2012DX006)
文摘A tunable single-longitudinal mode erbium-doped fiber ring laser based on stepper motor and closed loop control is proposed and demonstrated. The system consists of an erbium-doped fiber （EDF）, a tunable fiber Bragg grating （FBG） filter and a wavelength detector. The characteristics of output laser, such as output power, power stability and 3-dB linewidth, are investigated in the operation range of I 531-1 569 nm. The repeated experimental results of the fiber laser show that the 3-dB linewidth is less than 17 ps, the side-mode suppression ratio （SMSR） is up to 60 dB, the outout Dower is up to 1.37 dBm. and the Dower variation is less than 0.61 dR
文摘A novel fiber Bragg grating （FBG） rain gauge is proposed in this paper to achieve high precision rainfall measurement. One core sensitive FBG, a temperature compensation FBG and a mechanical transition system construct this novel FBG rain gauge. Sensing principle of this FBG rain gauge is explained in detail, and its theoretical calculation model is also established, which shows that the relationship between center wavelength of sensitive FBG and external rainfall has very good linearity. To verify its detection performance, the calibration experiment on one prototype of this FBG rain gauge is carried out. After experiment data analysis, the detection precision of this FBG rain gauge is 15.4/.tm which is almost two orders of magnitude higher than that of the existing rainfall measurement device. The experimental data confirm that this FBG rain gauge can achieve rainfall measurement with high precision.
