發(fā)布時(shí)間：2018-05-17 16:23

  本文選題：染料激光 + Stilbene��； 參考：《河南師范大學(xué)》2017年碩士論文

【摘要】：關(guān)于激光在水下通信技術(shù)的應(yīng)用,要求激光的波長(zhǎng)范圍需要在420-532nm之間。而Stilbene 420這種染料在受355nm激光激發(fā)時(shí)輸出中心波長(zhǎng)425nm的激光,輸出范圍為419-434nm,正處于海水的低吸收區(qū),恰好滿足這一要求。所以關(guān)于Stilbene 420的光學(xué)特性的研究對(duì)水下通信及軍事反潛等領(lǐng)域是很有必要的。所以本文對(duì)Stilbene420染料溶液進(jìn)行了實(shí)驗(yàn)研究和探討分析,從多方面來(lái)了解Stilbene 420染料的各種光學(xué)特性。利用高精度熒光光譜儀測(cè)得了Stilbene 420溶液分別在三種不同波長(zhǎng)泵浦下的熒光光譜,當(dāng)激光為405nm激光時(shí),溶液的熒光波長(zhǎng)是390-550nm,波峰位置出現(xiàn)在420nm處,波峰位置處熒光的能量與溶液濃度成正相關(guān)關(guān)系;當(dāng)泵浦激光為450nm的激光時(shí),熒光波長(zhǎng)范圍是550-700nm,波峰位置在621nm處,波峰處熒光能量隨溶液濃度的增高而增加;當(dāng)泵浦激光為532nm的激光時(shí),熒光波長(zhǎng)范圍是550-750nm,波峰位置處于619nm處,熒光能量與溶液濃度成正比。總結(jié)來(lái)說(shuō),就是對(duì)于同一波長(zhǎng)的泵浦激光,溶液的熒光能量與溶液濃度成正比。通過(guò)給光路加上平行磁場(chǎng)來(lái)研究磁場(chǎng)對(duì)Stilbene 420染料激光的透過(guò)率,從而探究磁場(chǎng)對(duì)其產(chǎn)生的光偏轉(zhuǎn)。實(shí)驗(yàn)結(jié)果證明,對(duì)于同一濃度的溶液,在固定波長(zhǎng)的泵浦激光激發(fā)下,當(dāng)磁場(chǎng)強(qiáng)度增加時(shí),激光透過(guò)率也增加,也就是透過(guò)率與磁場(chǎng)強(qiáng)度成正比,磁場(chǎng)強(qiáng)度越強(qiáng),光偏轉(zhuǎn)越明顯。對(duì)比同一泵浦激光下的不同濃度的溶液,發(fā)現(xiàn)當(dāng)磁場(chǎng)強(qiáng)度固定時(shí),溶液的激光透過(guò)率與溶液濃度在一定范圍內(nèi)成正比。使用Z-掃描技術(shù)對(duì)Stilbene 420染料溶液的光學(xué)非線性進(jìn)行了探究,根據(jù)實(shí)驗(yàn)數(shù)據(jù)結(jié)合各種實(shí)驗(yàn)參數(shù)對(duì)所得結(jié)果進(jìn)行了處理,證實(shí)Stilbene 420染料溶液確實(shí)具有光學(xué)非線性,并且穩(wěn)定的激發(fā)光源激發(fā)下,溶液的非線性與溶液濃度正相關(guān)。主要探究了Stilbene 420溶液的熒光特性和非線性光學(xué)效應(yīng)。觀測(cè)了Stilbene 420染料溶液的熒光光譜,通過(guò)模塊化多功能光柵光譜儀實(shí)驗(yàn)測(cè)得不同波長(zhǎng)的泵浦激光作用下Stilbene 420染料溶液的熒光光譜,對(duì)比了不同Stilbene 420染料溶液濃度的熒光特性。并研究了磁場(chǎng)對(duì)Stilbene 420染料溶液透過(guò)率的影響,比較了恒定磁場(chǎng)對(duì)不同濃度Stilbene 420染料溶液的激光透過(guò)率的影響。研究結(jié)果表明:Stilbene 420溶液的熒光光譜呈寬帶結(jié)構(gòu),熒光強(qiáng)度隨著溶液濃度的增加而增強(qiáng);激光透過(guò)率隨著磁場(chǎng)強(qiáng)度的增加而增強(qiáng),并隨著溶液濃度的增加而增強(qiáng)。Stilbene 420染料溶液的非線性折射系數(shù)為負(fù),具有較明顯的現(xiàn)象。
[Abstract]:For the application of laser in underwater communication technology, the wavelength range of laser must be between 420-532nm. However, the Stilbene 420 dye is in the low absorption region of seawater when it is excited by 355nm laser, and the output range of the 425nm laser is 419-434 nm, which meets this requirement. So it is necessary to study the optical properties of Stilbene 420 for underwater communication and military antisubmarine. In this paper, the experimental study and analysis of Stilbene420 dye solution are carried out, and the optical properties of Stilbene 420 dye are studied from many aspects. The fluorescence spectra of Stilbene 420 solution pumped by three different wavelengths were measured by using a high precision fluorescence spectrometer. When the laser is a 405nm laser, the fluorescence wavelength of the solution is 390-550 nm, and the peak position appears at the 420nm. The fluorescence energy at the peak position is positively correlated with the concentration of the solution, when the laser is pumped by 450nm, the fluorescence wavelength ranges from 550-700 nm, and the peak position is at the 621nm, and the fluorescence energy at the peak increases with the increase of the concentration of the solution. When the pump laser is a 532nm laser, the fluorescence wavelength ranges from 550 to 750 nm, the peak is located at the 619nm, and the fluorescence energy is proportional to the concentration of the solution. To sum up, the fluorescence energy of the solution is proportional to the concentration of the solution for the pump laser of the same wavelength. The transmittance of the magnetic field to the Stilbene 420 dye laser is studied by adding a parallel magnetic field to the optical path, and the optical deflection of the magnetic field to the dye laser is investigated. The experimental results show that for the solution of the same concentration, the laser transmittance increases when the magnetic field intensity increases under the excitation of a fixed wavelength pumped laser, that is, the transmittance is directly proportional to the magnetic field intensity, and the stronger the magnetic field intensity is, The deflection of light is more pronounced. It is found that the laser transmittance of the solution is proportional to the concentration of the solution in a certain range when the magnetic field intensity is fixed compared with the solution of different concentration under the same pump laser. The optical nonlinearity of Stilbene 420 dye solution was investigated by using Z- scan technique. The results were processed according to the experimental data and various experimental parameters. It was proved that the Stilbene 420 dye solution had optical nonlinearity. And the nonlinearity of the solution is positively correlated with the concentration of the solution under the excitation of a stable excitation source. The fluorescence characteristics and nonlinear optical effects of Stilbene 420 solution were investigated. The fluorescence spectra of Stilbene 420 dye solution were observed. The fluorescence spectra of Stilbene 420 dye solution were measured by modularized multifunction grating spectrometer. The fluorescence characteristics of Stilbene 420 dye solution were compared with those of different concentration of Stilbene 420 dye solution. The influence of magnetic field on the transmittance of Stilbene 420 dye solution was studied, and the influence of constant magnetic field on the laser transmittance of Stilbene 420 dye solution with different concentration was compared. The results show that the fluorescence spectra of the solution of: Stilbene 420 are wideband, and the fluorescence intensity increases with the increase of the concentration of the solution, and the laser transmittance increases with the increase of the magnetic field intensity. The nonlinear refraction coefficient of Stilbene 420 dye solution was increased to negative with the increase of solution concentration.
【學(xué)位授予單位】：河南師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TQ610.1;TN24

【參考文獻(xiàn)】

相關(guān)期刊論文 前6條

1 鄭文琦;單凝;法煥寶;石瑩巖;;卟啉單體和卟啉二聚體的光限幅性質(zhì)[J];吉林大學(xué)學(xué)報(bào)(理學(xué)版);2013年01期

2 彭文炫;馮國(guó)英;張秋慧;伍愛(ài)明;柳巋;李密;宋影松;;“綠色”液體激光介質(zhì)的非線性光學(xué)特性研究[J];光子學(xué)報(bào);2011年07期

3 ;Measurements of ocean wave spectrum from airborne radar at small incidence angles[J];Acta Oceanologica Sinica;2011年01期

4 趙永貴;宋瑛林;楊俊義;;不同激光脈沖寬度下甲苯的光學(xué)非線性特性的研究[J];光子學(xué)報(bào);2009年07期

5 韓亞萍;陳炳才;葉紅安;楊延強(qiáng);吳文智;曹言;;飛秒Z掃描技術(shù)測(cè)量材料光學(xué)非線性的研究[J];黑龍江大學(xué)自然科學(xué)學(xué)報(bào);2007年02期

6 陳志敏;吳誼群;左霞;宋瑛林;;四叔丁基四氮雜卟啉配合物的合成、熱穩(wěn)定性及光限幅特性研究[J];無(wú)機(jī)化學(xué)學(xué)報(bào);2006年01期

相關(guān)博士學(xué)位論文 前1條

1 陳經(jīng)緯;有機(jī)π電子共軛化合物復(fù)合薄膜的三階非線性光學(xué)性能研究[D];山東大學(xué);2012年

相關(guān)碩士學(xué)位論文 前1條

1 盧曉洋;基于FBGA的光纖光柵解調(diào)儀系統(tǒng)研究與開(kāi)發(fā)[D];山東大學(xué);2011年

，

本文編號(hào)：1902044