cavity length 中文意思是什麼
cavity length
解釋
空泡長度-
Based on the bedding features of weak intercalations in sandstone plates near the top of underground cavity, the probable failure scale of bedding sliding, the probable settlement, the folding places and the critical length of sandstone beams are computed seperately, then the stability of underground cavity is analysed
針對地下工程頂部層狀砂巖中存在順層發育軟弱夾層的情況，分別對開挖后可能出現的層間滑動破壞范圍、巖板的沉降、折斷和臨界長度進行計算，並分析其穩定性。 -
At the same time the influence of the cavity in front of slow - wave structure and the length of a smooth drift tube which connect two sections of slow - wave structure are also studied in this dissertation
然後利用magic粒子模擬軟體模擬了反射器對器件工作性能的影響，同時還分析了慢波系統前面的腔體以及兩段式慢波結構中過渡段的長度對器件工作性能的影響。 -
The geode - essentially a rock cavity which has become lined with crystalline deposits - is eight meters in length, 1. 8 metres wide and 1. 7 metres high ( 26 feet by six by six )
這個晶洞-原本是巖石洞演變成線狀水晶堆積物-是長8米，寬1 . 8米和高1 . 7米（ 26英尺x六英尺x六英尺） 。 -
Based on the reseaching of lycoris leaf micro - morphology characters by sem scanning, light microscope viewing and using paraffin method in the article, we try to provide the proofs of experiment and the efffective characer indexes to discuss the system and evolution of the lycoris. we find these microscope characers through reseach are as follows : the arrangement type, density and the length of stoma ; the shape and length of the epidermal cells ; the ridge of epidermis ; the transverse shape of leaf ; the number of the vascular bundle ; the style of vessel arrangement of vascular bundle in the middle vein ; the layers of palisade tissue ; the ratio of the thicken of palisade tissue to that of spongy tissue ; the angle number of the middle leaf ; the type of ventilating cavity etc. these characters are different from those of species in lycoris, meanwhile these characters are similar to those of some species in lycoris. so these characters can be used as the character indexes for differentiating species and reseaching systematic evolution of lycoris ; we can divide lycoris into two subgenus by these characteristic indexes : the species of one subgenus are l. aurea ( l " her. ) herb, chinensis traub, l. caldweuii traub, l. anhuiensis y. hsu et q. j. fan, l. longituba y. hsu et q. j. fan ; the species of another subgenu s are l. houdyshelii traub, l. albiflora koidz.,
研究結果表明：葉表皮的氣孔排列方式、長度、長寬比，脊的明顯與否，葉表皮上的顆粒紋飾的多少、大小，葉表皮細胞長度、長寬比、垂周壁形狀，上部葉柵欄組織細胞層數、葉的維管束數、葉中脈導管組成數目，氣腔類型，葉的脊部遠軸面的角數，葉緣的形狀等這些特徵在種間存在差異，同時，在有些種之間又有相似性；因此，這些特徵既可以作為區分種的證據，又是研究石蒜屬植物系統演化的性狀指標，根據這些性狀指標，可以將石蒜屬植物大致分為兩個亞屬：一是忽地笑、中國石蒜、短蕊石蒜、安徽石蒜、長筒石蒜，二是江蘇石蒜、乳白石蒜、石蒜、玫瑰石蒜、稻草石蒜；在兩個亞屬中其中有些種如忽地笑、長筒石蒜、中國石蒜的親緣關系則更近些。 -
Firstly, we analyze the character of nd : yag, bbo and lbo, for nd : yag crystal and select the nd : yag as the gain medium and lbo as doubling - frequency crystal. ln the theory, analyzing the parameter of the gain medium length, the ratio of the pump - and laser - beam waists. based on the above analysis, we design the resonance cavity
首先，我們對增益介質的性質和非線性晶體bbo和lbo的一些性質進行了比較，選取nd ： yag作為增益介質， lbo作為倍頻晶體。理論上分析了激光器設計中的一些參數值，如增益介質長度、模式交疊率、最佳倍頻條件，並根據理論分析結果設計了諧振腔。 -
The influences of optical feedback and external cavity length on the laser output are studied, and the relation between fluctuations of speckle signal and the transverse velocity of rough surface is discussed
分析了隨機變化的反饋強度與外腔長度對激光光譜特性的影響。模擬了散斑干涉信號的波動與粗糙表面橫向移動速度的關系。 -
The temperature of the f - p cavity is accurately controlled by a set of thermoelectric cooler ( tec ) modules attached on the body of the cavity and the electronic feed - back circuit. we found that the long - term unidirectional frequency shift of the output laser resulting from the slow increase of the cavity length under the effect of the temperature integration on the cavity body is essentially eliminated
因此，往往有多臺f ? p腔出現在同一個實驗裝置中本文利用珀耳帖元件，對穩頻系統中作為頻率參考標準的fabry ? perot干涉儀進行精密控溫，並利用f - p腔的透射特性，對自製的全固化單頻nd ： yvo _ 4激光器穩頻。 -
Some factors related to the trap potential and heating rate are considered, such as the laser detuning, the changing of cavity length, laser power of trapping beam, and the linewidth of laser. 7 ) an ultra - high finesse micro - cavity is established in our lab
6 ）對超高精細度微腔內光學偶極阱進行了數值模擬，研究了光場失諧、腔長變化、功率、以及線寬等參數對腔內偶極阱的阱深以及加熱率的影響。 -
4 ) the tuning characteristics of doubly - resonant optical parametric oscillator propo ) output by changing crystal ' s temperature, opo ' s cavity length and pump frequency respectively are theoretically analyzed and experimental obtained the wavelength of the opo output can be tuned from 2038nm to 2227nm by the crystal ' s temperature changed of 5. 3, from 2044nm to 2219nm by the cavity length changed of 514nm, and 375mhz by the pump frequency continuously tuned 750mhz
當晶體溫度變化5 . 3時，得到2038nm - 2227nm可調諧下轉換光輸出；當opo的腔長相對于簡並點腔長變化514nm時，得到2044nm - 2219nm可調諧下轉換光輸出：當泵浦光頻率連續的改變了750mhz時，下轉換光的頻率相應連續調諧375mhz 。理論擬合與實驗結果基本一致。 -
Fiber lasers are very sensitive to environmental perturbations such as temperature fluctuations and mechanical vibrations due to their relatively long cavity length when the external environment changing. the cavity drifting produceing the phase noise and amplitude noise, this can cause the output pulse unstablely
但由於主動鎖模光纖激光器腔內有較長的光纖，而光纖的長度極易因外界環境的影響而發生漂移，因而調制頻率和腔長很難保持匹配。 -
The cavity length is measured to be about 48 m and the cavity losses are determined by the cavity ring - down ( crd ) technique
7 ）建立了一套超高精細度光學微腔，腔長約48林m 。 -
4. the theory of cavity enhanced absorption spectroscopy is studied in detail and the numerical simulation is firstly demonstrated. in addition, we analyze the variation of sensitivity and linearity of this technique with the scan speed of incident light frequency or absorption cavity length
深入研究了腔內增強吸收光譜的理論，首次給出了具體的解析表達形式及數值模擬計算結果，分析了腔內增強吸收光譜測量的靈敏度、線性度與激光頻率掃描速度、吸收腔長改變速度的關系。 -
Used as ring - down cavity, this stable resonator has, firstly, more influence of misalignment of cavity mirrors on its measured reflectivity, but less of length misadjustment ; secondly, shorter cavity length which advantageous in engineering ; finally, less diffraction loss and thus higher metrical precision
結果表明，這種穩定腔用作衰蕩腔，測量結果受腔鏡角度失調影響較大，而受腔長失調影響小；其長度較短，便於工程應用；衍射損耗較小，測量精度高。 -
According to propagation equation of gaussian beam and matrix of misadjust resonator, as well as principle of cavity ring - down method and data processing of fitting, a physical model of reflectivity measuring is set up for misadjustment of cavity length or angle of titled cavity mirrors
根據光束傳輸規律和失調腔矩陣方法，以及光腔衰蕩法測量原理和曲線擬合方法，建立了腔長、腔鏡角度失調下光腔衰蕩法的反射率測量模型。 -
Based on the change of misalignment sensitivity with the length of cavity, a kind of ring - down cavity is put forward, which is stable resonator, and its cavity length is 0. 73 times as that of confocal cavity
摘要基於諧振腔失調靈敏度參量隨腔長的變化關系，提出了一種衰蕩腔，它是由共焦腔將腔長縮短為原來的0 . 73得到的穩定腔。 -
In this work, based on the threshold condition of the fiber grating external cavity semiconductor laser ( fgesl ) which the phase of the fiber grating has been included, the effect of the temperature variation and the fg external cavity length on the lasing wavelength of the fgesl has been investigated theoretically. in addition, we have used the phase condition of fgesl to get the longitudinal mode distribution of fgesl, then the influence of the injected current on the output characteristics of fgesl has been studied
基於此，本文中利用陽實際的反射相位分佈，計及半導體激光器（ ld ） 、外腔及光纖光柵（ fg ）三者的共同作用，根據fgesl滿足的閩值條件，從理論上研究了溫度及外腔長度的變化對fgesl激射波長的影響;根據fgesl中縱模所滿足的相位條件得到其縱模分佈后，利用fgesl滿足的多模速率方程，研究了ld的注入電流對fgesl輸出特性的影響。 -
( 2 ) under certain temperature, for a short external cavity, a slight change of the external cavity length will result in an obvious variation of the lasing wavelength ; and for a long external cavity ( > 10cm ), the change of the external cavity length gives almost no effect on the lasing wavelength
當溫度保持一定時，對于短外腔，外腔長度的微小變化可以導致fgesl的激射波長產生顯著的變化;而對于長外腔（尤其當外腔長度大於10cm ）時，外腔長度的變化對fgesl的激射波長基本沒有影響。 -
Part 2 : the background and principle of measuring the losses in the high - finesse cavity with the technique of ringdown are showed and the high - finesse cavity composed of super mirrors, with cavity length of 17. 8mm is set up. by cavity - ringdown experiment, we can get the finesse about 2 105 and total losses of the high - finesse cavity about 30ppm
實驗上建起一套由「超鏡」構成腔長為17 . 8mm的高精細度腔，並測得光在腔內的衰蕩信號，推算出腔的精細度約為20萬和損耗約為30ppm 。 -
For the ld pumped self - q - switched laser, the peak power, pulse energy, pulse width and energy extraction efficiency, which have been influenced by the loss in the cavity, cavity length and the threshold absorption coefficiency of the absorber, have been calculated. then we know how to choose the parameters of the self - q - switched laser for design
根據自調q二極體泵浦固體激光器的特點，計算了腔內損耗、腔長和飽和吸收體的初始吸收系數對于峰值功率、單脈沖能量、脈沖寬度和能量利用率的影響，並由此提出了設計自調q激光器中的參數選擇規律。 -
In this thesis, we used the q - switched nd : yag laser pulse focused by lens to pump the cr ~ ( 4 + ) : mg _ 2sio _ 4 crystal, with the pump laser pulse duration and energy of 30ns and 50 mj separately, and got the laser pulse with center wavelength, pulse duration and energy of 1. 22 m, 8. 2 ns and 10 mj on the best work condition. on the base of zhangguowei s approximation about gain - switching and the parameter of cr ~ ( 4 + ) : mg _ 2sio _ 4 crystal, we calculated the time characteristics of cr ~ ( 4 + ) : mg _ 2sio _ 4 laser pulse with rate equation by numerical method, obtained the conclusion that the laser pulse duration is only related to the pump energy and cavity length : the larger the pump energy is, the narrower the pulse duration is ; the longer the cavity is, the wider the
本論文採用調qnd : yag脈沖激光通過透鏡聚焦后縱向抽運cr ~ （ 4 + ） : mg _ 2sio _ 4晶體，抽運光脈沖寬度為30ns 、能量為50mj ，在較佳工作條件下得到了中心波長為1 . 22 m 、脈寬為8 . 2ns 、能量為10mj的激光脈沖;並在張國威分析增益開關時間特性的近似法基礎上，結合實際的cr ~ （ 4 + ） : mg _ 2sio _ 4激光器的相關參數，從速率方程出發，用數值計算的方法更為精確的模擬了cr ~ （ 4 + ） : mg _ 2sio _ 4激光器輸出激光脈沖的時間特性，得出了激光脈寬只與抽運能量、腔長有關的結論，即抽運能量愈大，脈寬越窄;腔長越長，脈寬則愈寬。
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