本文選題：光纖傳感 + 普通單模光纖��； 參考：《物理學報》2017年01期

【摘要】：利用普通單模光纖(SMF)與色散補償光纖(DCF)分別具有正色散和負色散系數特性,實現光纖光柵陣列的高速高精度解調.系統(tǒng)采用全光纖結構,僅需發(fā)出單一高速光脈沖,即可根據反射光脈沖時延差同時獲取各個光柵的波長與位置信息,大幅提高了光纖光柵解調速度;通過建立DCF-SMF雙通道和色散差矯正模型,削弱了溫度變化及色散值誤差對系統(tǒng)解調精度的影響.實驗表明,本方法解調速率可達1 MHz,解調過程受傳感網絡光纖及雙通道溫變影響較小,具有良好穩(wěn)定性及高精度;5—75?C溫度擾動實驗中,傳感網絡傳輸光纖溫變時系統(tǒng)解調均方差16.8 pm,DCF-SMF雙通道受溫度擾動時系統(tǒng)解調均方差為11.9 pm,恒溫下系統(tǒng)長時間解調時均方差為6.4 pm;應力實驗中,解調線性度可達0.9998,解調精度約為8.5 pm.
[Abstract]:The high speed and high precision demodulation of fiber Bragg grating arrays is realized by using common single-mode fiber (SMF) and dispersion-compensated fiber (DCF) with positive dispersion and negative dispersion coefficient respectively. The system adopts all-fiber structure, only needs to send out a single high-speed optical pulse, can simultaneously obtain the wavelength and position information of each grating according to the time delay difference of reflected light pulse, which greatly improves the demodulation speed of fiber grating. The influence of temperature variation and dispersion error on the demodulation accuracy of the system is weakened by establishing the DCF-SMF dual-channel and dispersion correction model. The experimental results show that the demodulation rate of this method can reach 1 MHz, and the demodulation process is less affected by the temperature variation of optical fiber and dual channels in the sensor network, and has good stability and high precision in the experiment of temperature disturbance of 5-75 鈩，

本文編號：1924479