本文選題：波長(zhǎng)解調(diào)　切入點(diǎn)：邊緣濾波法　出處：《光譜學(xué)與光譜分析》2017年09期 　論文類型：期刊論文

【摘要】：提出了一種改進(jìn)型邊緣濾波波長(zhǎng)解調(diào)技術(shù),解決干涉型或諧振型光纖傳感器輸出的干涉譜波長(zhǎng)的快速解調(diào)問題。該波長(zhǎng)解調(diào)技術(shù)基于啁啾光柵和長(zhǎng)周期光柵的光譜特點(diǎn),以啁啾光柵作為矩形濾波器,提取傳感器輸出干涉譜的一個(gè)干涉峰;以長(zhǎng)周期作為邊緣濾波器,將干涉峰的波長(zhǎng)信息轉(zhuǎn)化為光強(qiáng)信息進(jìn)行檢測(cè)。該波長(zhǎng)解調(diào)技術(shù)波長(zhǎng)解調(diào)范圍為傳感器輸出干涉譜的一個(gè)自由光譜范圍(FSR),解調(diào)速度快,克服了當(dāng)前波長(zhǎng)解調(diào)技術(shù)中存在的測(cè)量范圍與測(cè)量速度難以同時(shí)提高的問題,同時(shí)還具有系統(tǒng)成本低,體積小,能夠靈活多路擴(kuò)展的特點(diǎn)。詳細(xì)介紹了解調(diào)系統(tǒng)的工作原理以及系統(tǒng)結(jié)構(gòu),并將其實(shí)際應(yīng)用于一種干涉型光纖電流傳感器輸出干涉譜的波長(zhǎng)解調(diào)中。通過實(shí)驗(yàn)證明電流傳感器工作在工頻及脈沖電流(脈沖寬度25μs)情況下,該解調(diào)系統(tǒng)對(duì)傳感器輸出干涉譜具有準(zhǔn)確、快速的解調(diào)效果。該研究對(duì)推進(jìn)干涉或諧振型光纖傳感器的實(shí)際工程化水平的提高具有重要意義。
[Abstract]:An improved edge filter wavelength demodulation technique is proposed to solve the problem of fast demodulation of interference spectrum wavelength output from interferometric or resonant fiber optic sensors. The wavelength demodulation technique is based on the spectral characteristics of chirped grating and long period grating. The chirped grating is used as a rectangular filter to extract an interference peak of the sensor output interference spectrum, and a long period of time is used as the edge filter. The wavelength information of the interference peak is converted into light intensity information for detection. The wavelength demodulation range of the wavelength demodulation technique is a free spectrum range of the sensor output interference spectrum and the demodulation speed is fast. It overcomes the problem that the measurement range and the measuring speed are difficult to increase simultaneously in the current wavelength demodulation technology, and at the same time, it has the advantages of low system cost and small volume. The principle and structure of the demodulation system are introduced in detail. It is applied to the wavelength demodulation of an interferometric fiber optic current sensor output interference spectrum. It is proved by experiments that the current sensor works at the condition of power frequency and pulse current (pulse width 25 渭 s). The demodulation system has an accurate and fast demodulation effect on the output interference spectrum of the sensor, and the research is of great significance to the improvement of the practical engineering level of the interferometric or resonant fiber optic sensor.
【作者單位】： 西安交通大學(xué)電力設(shè)備電氣絕緣國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51377125) 高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)科研基金項(xiàng)目(20110201110059)資助
【分類號(hào)】：TP212

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本文編號(hào)：1562009