laser pulse length 中文意思是什麼
laser pulse length
解釋
激光脈沖長度-
Theoretical result indicated that the self - q - switching in er - doped fiber laser based on sbs process was feasible in mathematics, and the conclusion has been presented that the dynamic characteristics of output pulse by sbs are effected tinily by the length of er - doped fiber in the system
模擬實驗結果表明利用單模光纖的受激布里淵散射效應可在摻鉺光纖激光器系統內穩定形成自調q過程，同時得到sbs產生激光脈沖動態特性受到摻鉺光纖長度改變量影響不大這一結論。 -
With double - frequency technique and q switch technique the laser delivers a laser pulse of 532 - nm in wavelength, 5 - ns in pulse width, 35 - mj in energy and 2 - cm in coherent length
所用激光器為nd : yag脈沖激光器，採用了調q和二倍頻技術，波長為0 . 532 、脈沖寬度為7ns 、相干長度為2cm ，能量為35mj 。 -
The thesis analyzed the effects, associated with the propagation of laser in plasma channel, such as diffraction, plasma defocusing, the third - order intensity - dependent nonlinearity, the relativistic self - focusing, the focusing and defocusing of the plasma channel, and the absorbtion in the collision plasma and the finite pulse length effect
文中用哈密頓-雅可比方程方法和源展開方法分別對激光在等離子體隧道中傳輸所涉及的衍射效應、等離子體散焦效應、三階強度非線性、相對論自聚焦、等離子體隧道的聚焦和散焦效應、碰撞等離子體中的吸收效應、有限脈寬效應等等做了基本的闡述。 -
In the case of ultrashort laser pulse, the effect of finite pulse length is anlyzed, and self - steepening in the front of the pulse will occur when only relativistic nonlinearity is considered
同時，對于超短脈沖傳輸，分析了有限脈沖寬度效應對傍軸方程的修正，當只考慮相對論性非線性效應時將會引起激光脈沖前沿自陡峭。 -
Chapter 3 : the source - dependent expansion ( sde ) method for analyzing the wave equation is introduced, which is an effective method for solving the paraxial wave equation with nonlinear source terms. two examples have been given to explain this method, which are the propagation of the ultrashort intense laser pulses propagation in the partially stripped plasma in which the collisions of plasma electrons are taken into account, and the propagation including the finite pulse length effect
第三章：本章介紹了求解有非線性源項的傍軸方程的有效方法-源展開方法，並給出了兩個具體的例子，即考慮等離子體電子間碰撞的隧道傳輸的求解和考慮激光脈沖的有限脈寬效應的隧道傳輸求解。 -
It has been presented in this dissertation that using model of q modulated er - glass laser, through replacing typical number of er - doped fiber and single mode fiber into the model, then the theoretical model of self - q - switching by sbs was established. by emulating experiment, the peak value of output power, repeating frequency, width of pulse have been calculated. the data was calculated repeatedly when the length of er - doped fiber changing
將摻鉺光纖和單模光纖的典型值數據代入該模型中，進行模擬實驗研究得出sbs自調q光纖激光器輸出峰值功率、脈寬、重頻等數據，並在改變摻鉺光纖長度的情況下，再次進行模擬實驗，對上述輸出結果進行了分析。 -
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。 -
( 3 ) properties of yag laser q - switching by sbs were experimentally investigated, and the laser without back reflective mirror was devised, and laser pulse was obtained at repetition rate ihz and 5hz by optimizing lens focal length, length of cell and position of lens focal. point, resulting quality of pc is ideal
（ 4 ） 、實驗研究了sbs的yag激光器，設計了無後向反射鏡的sbsyag激光器。在泵浦能量17j 、重復頻率分別為1hz 、 5hz時，得到穩定輸出的能量為19mj 、脈寬為10 . 7ns 、光束質量很好的激光脈沖。 -
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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