本文選題：光纖傳感 + 普通單模光纖　； 參考：《物理學(xué)報(bào)》2017年01期

【摘要】：利用普通單模光纖(SMF)與色散補(bǔ)償光纖(DCF)分別具有正色散和負(fù)色散系數(shù)特性,實(shí)現(xiàn)光纖光柵陣列的高速高精度解調(diào).系統(tǒng)采用全光纖結(jié)構(gòu),僅需發(fā)出單一高速光脈沖,即可根據(jù)反射光脈沖時(shí)延差同時(shí)獲取各個(gè)光柵的波長(zhǎng)與位置信息,大幅提高了光纖光柵解調(diào)速度;通過(guò)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(duì)系統(tǒng)解調(diào)精度的影響.實(shí)驗(yàn)表明,本方法解調(diào)速率可達(dá)1 MHz,解調(diào)過(guò)程受傳感網(wǎng)絡(luò)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(dòng)實(shí)驗(yàn)中,傳感網(wǎng)絡(luò)傳輸光纖溫變時(shí)系統(tǒng)解調(diào)均方差16.8 pm,DCF-SMF雙通道受溫度擾動(dòng)時(shí)系統(tǒng)解調(diào)均方差為11.9 pm,恒溫下系統(tǒng)長(zhǎng)時(shí)間解調(diào)時(shí)均方差為6.4 pm;應(yīng)力實(shí)驗(yàn)中,解調(diào)線性度可達(dá)0.9998,解調(diào)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(hào)：1924479