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id="Top1"></li> </ul> <div id="zbbbnpu2h4x" class="clear"></div> </div> <div id="zbbbnpu2h4x" class="clear"></div> </div> <div id="zbbbnpu2h4x" class="clear"></div> </div> <div id="zbbbnpu2h4x" class="blockindex h450"> <div id="zbbbnpu2h4x" class="new9"> <div id="zbbbnpu2h4x" class="new91"> <h1>研究人員研制出在空芯光纖中高速傳輸?shù)奈⑿图す馄?/h1> 發(fā)布時(shí)間：2024-06-05 </div> <div id="zbbbnpu2h4x" class="new92"> <div class="zbbbnpu2h4x" id="contentt"></div> 2018年3月20日，據(jù)美國(guó)光學(xué)學(xué)會(huì)報(bào)道，研究人員在光纖內(nèi)部，以光學(xué)方式捕獲并激發(fā)的一個(gè)基于粒子的厘米級(jí)激光器。新的高速傳播微型激光器可以沿著光纖長(zhǎng)度方向進(jìn)行高靈敏度的溫度測(cè)量，并且可以提供一種新穎的方式來將光線地傳輸?shù)竭h(yuǎn)處且難以達(dá)到的位置。<br>“這種高速微型激光器在體內(nèi)傳輸光的方面潛力。”德國(guó)馬克思普朗克光學(xué)科學(xué)研究所richard zeltner說。“通過把光纖插入皮膚，微型激光器可以提供波長(zhǎng)合適、定位準(zhǔn)確的光作用于光敏藥物。這個(gè)概念也可以應(yīng)用于光流控芯片實(shí)驗(yàn)室器件，為各種生物分析技術(shù)或芯片上溫度測(cè)量提供具有高空間分辨率的光源。”在《the optical society》(osa)光學(xué)期刊上，由philip st.j. russell帶領(lǐng)的研究人員報(bào)道稱，高速微激光器可以以毫米級(jí)的空間分辨率進(jìn)行位置敏感的溫度傳感測(cè)量。這個(gè)示例展示了高速微型激光器在分布式傳感方面的實(shí)用性，以及沿著光纖方向?qū)崿F(xiàn)實(shí)時(shí)、連續(xù)測(cè)量的方法。<br>高速傳輸微型激光器是基于一個(gè)回音壁模式的諧振器，這是一種限制并增強(qiáng)某些波長(zhǎng)光的小顆粒。這個(gè)名字來源于這樣一個(gè)現(xiàn)象，即光波沿著這些粒子彎曲的內(nèi)表面?zhèn)鞑?，就像聲波在保羅大教堂的回音壁中傳播一樣，讓畫廊的另一側(cè)清晰地聽到耳語聲。<br>“這是使用回音壁模式諧振器的分布式感測(cè)演示，”zeltner說，“這種獨(dú)特的傳感方法為分布式測(cè)量和高空間分辨率遠(yuǎn)程物理性能評(píng)估開辟了許多新的可能性。例如，它對(duì)惡劣環(huán)境下的溫度傳感很有用。”<br>制作高速傳輸?shù)募す馄?br>實(shí)現(xiàn)高速傳輸微型激光器的一個(gè)關(guān)鍵部分是一種特殊類型的光纖，稱為空芯光子晶體光纖。顧名思義，不同于傳統(tǒng)光纖的實(shí)心玻璃，這種光纖的芯區(qū)部分是空的?？招静糠直徊Ａ⒔Y(jié)構(gòu)包覆，該玻璃微結(jié)構(gòu)可將光限制在光纖內(nèi)部。<br>“在相當(dāng)長(zhǎng)的一段時(shí)間里，我們的研究小組一直在開發(fā)空心光子晶體光纖中光阱粒子的必要技術(shù)，” 研發(fā)小組成員shangran xie說。“在這項(xiàng)新工作中，我們能夠應(yīng)用這項(xiàng)技術(shù)不僅僅是為了捕獲一個(gè)粒子，而且還要使它成為一個(gè)能夠?qū)崿F(xiàn)光纖中遠(yuǎn)距離探測(cè)的激光。”<br>一個(gè)回音壁模式微粒沿著空芯光纖傳輸，光纖嵌入的金屬v型槽實(shí)現(xiàn)加熱功能。初，只有一束受限的激光束從光纖左端導(dǎo)入光纖。大約37秒后，第二束受限激光束從光纖右端導(dǎo)入，使得粒子停止傳輸并捕獲在v形槽的中心。<br>為了實(shí)現(xiàn)高速傳輸?shù)奈⑿图す馄?，研究人員將激光射入充滿水的中空纖芯中，以光學(xué)方式捕獲微粒。與用于制造傳統(tǒng)激光器的材料一樣，微粒也包含增益介質(zhì)。研究人員使用第二束激光激發(fā)這種增益介質(zhì)，引起微粒發(fā)光或激射。粒子在光纖中的位置是通過捕獲激光產(chǎn)生的光學(xué)力或通過芯區(qū)內(nèi)部水流來控制。<br>的溫度傳感<br>為了測(cè)試新系統(tǒng)感知溫度變化的能力，研究人員將激光微粒沿著加熱到室溫以上22攝氏度光纖的兩個(gè)區(qū)域推進(jìn)。通過測(cè)量當(dāng)微激光穿過光纖時(shí)從微粒發(fā)出的激光波長(zhǎng)的偏移，可以地檢測(cè)溫度的變化。傳感器檢測(cè)到的溫度變化小于3攝氏度，并且提供了幾毫米的空間分辨率。<br>“這種分布式傳感器的空間分辨率終受到粒子大小的限制。”zeltner說。“這意味著，我們可以在很長(zhǎng)的測(cè)量范圍內(nèi)實(shí)現(xiàn)小至幾微米的空間分辨率，與其他類型的分布式溫度傳感器相比，這是我們系統(tǒng)的一個(gè)巨大優(yōu)勢(shì)。”<br>研究人員利用激光多普勒測(cè)速技術(shù)，確定在實(shí)驗(yàn)過程中，粒子以每秒250微米的速度移動(dòng)。他們說使用充滿空氣而不是水的光纖可以提高推進(jìn)速度到每秒厘米甚至米量級(jí)。<br>雖然實(shí)驗(yàn)中使用的微粒由于光漂白作用，導(dǎo)致在約一分鐘后失去激發(fā)能力，但研究人員表示，具有不同增益材料的微?？梢越鉀Q這個(gè)問題。他們還在探索是否可以在光纖內(nèi)部同時(shí)操縱多個(gè)微型激光器，并正在對(duì)粒子位置檢測(cè)方案進(jìn)行改進(jìn)。<br>“隨著空心光子晶體光纖的商業(yè)化進(jìn)程加快，這個(gè)系統(tǒng)成為實(shí)用型傳感器所需的所有技術(shù)已經(jīng)具備，” zeltner說。<br>(原文標(biāo)題：研究人員研制出在空芯光纖中高速傳輸?shù)奈⑿图す馄?<br> <div class="zbbbnpu2h4x" id="contentb"></div> </div> <div id="zbbbnpu2h4x" class="clearfix"></div> </div> <div>上一個(gè)：<a href="n878685.htm">海運(yùn)貨物至美國(guó)（海運(yùn)集運(yùn)到美國(guó)）</a><br /> 下一個(gè)：<a href="n878683.htm">簡(jiǎn)要介紹旋壓機(jī)床冷卻液過濾系統(tǒng)</a> <br /><br /> <a href="n878385.htm">RTT03751JTP現(xiàn)貨庫存，最新價(jià)格</a><br /> <a href="n878386.htm">如何使寒蘭清香四溢</a><br /> <a href="n878387.htm">蘋果怎么設(shè)置密碼，iPhone怎么設(shè)置密碼</a><br /> <a href="n878388.htm">氨茶堿治療免疫抑制大鼠腹腔感染的實(shí)驗(yàn)研究</a><br /> <a href="n878389.htm">清理電腦中的殘留文件(如何清除電腦系統(tǒng)殘留文件)</a><br /> <a href="n878390.htm">LX12-2行程開關(guān)</a><br /> <a href="n878391.htm">網(wǎng)站三級(jí)域名的設(shè)置方法</a><br /> <a href="n878392.htm">冷水機(jī)蒸氣壓縮制冷技術(shù)</a><br /> <a href="n878393.htm">云服務(wù)器怎么設(shè)置java</a><br /> <a href="n878394.htm">騰訊云正版圖庫直通車APE特性和應(yīng)用場(chǎng)景介紹</a><br /> </div> <div id="zbbbnpu2h4x" class="clear"></div> </div> <div id="zbbbnpu2h4x" 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