frequency double laser 中文意思是什麼
frequency double laser
解釋
倍頻激光器-
Therefore, the frequency - stabilised double longitudinal modes with thermoregulation were adopted. this method was realised by winding wire with high electrical resistance on to the neck of laser tube. heating was controlled by self - organised fuzzy control method
為此，提出了增加有纏繞于激光管頸上的電阻絲輔助加熱控制環節的自四川大學博一l :學位論文組織模糊控制雙縱模熱穩頻方法。 -
We have observed and recorded the relaxation oscillation of double - clad ytterbium - doped fiber laser by a digital oscillograph. the relaxation oscillation frequency is 20. 0khz
我們使用示波器觀察並記錄了雙包層摻鐿光纖激光器的弛豫振蕩現象，得到弛豫振蕩頻率為20 . 0khz 。 -
The detecting accuracy of the beam drift would be improved, as a high performance acoustooptic modulator modulates the frequency of the laser beam drift signal far away from the power frequency, the double power frequency and high frequency noises
具體包括: 1 .利用聲光調制器將光束漂移量信號調制到遠離工頻及其倍頻干擾和高頻噪聲的頻帶段，以期提高光束漂移量的檢測精度。 -
Therefore, the three fundamentals required to obtain high precise measurements are : 1 ) frequency stability and frequency difference stability of the double - frequency laser source as well as the stable equivalent length of bore ; 2 ) the measuring beam and the reference beam are placed very co - axially ; 3 ) capability of recording the sub - division of the period of phase change and a reversible counter system
因而干涉儀系統達到高精度的基礎是：頻率及頻差穩定的雙頻激光源、穩定的等效腔長；測量光與參考光合光後有很高同軸度的光路結構；能可靠記錄相位差變化周期數的細分及可逆計數系統三部分。 -
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 main works and results we have accomplished are as follows : 1 ) red - detuned locking of cooling / trapping laser to the cycling transition of cesium cooling has been accomplished by means of a double - passed acoustic - optical frequency shifting system and the technique of saturated absorption spectroscopy. the short - term residual frequency jitter is less than 350khz ; 2 ) automatic controlling system by computer programs has been established for laser cooling and trapping and cavity qed experiment. the laser and magnetic fields can be controlled by the acoustic - optical modulator and the electronic - controlled logic gate respectively
具體如下： 1 ）採用了往返兩次通過的聲光頻移系統結合飽和吸收光譜技術的實驗方案，實現了冷卻俘獲激光頻率相對于銫原子冷卻循環躍遷的負失諧鎖定，短期頻率穩定度約在350khz以內，並可方便地調節其負失諧量而無須對后續光路再作調整； 2 ）建立了一套基於計算機程序控制的、銫原子激光冷卻與俘獲實驗所需的時序控制系統。 -
The definition of stability and repeatability of the laser frequency and factors affecting the stability of laser frequency were analysed. the normal methods used to stabilise frequency and produce double - frequency were explained. after analysing the working conditions and related parameters of the laser device, it was concluded that the laser tube should be put inside an insulating cover and an electric discharge tube with a bigger diameter and length, smaller wall thickness and a higher thermal conductivity coefficient should be chosen
分析了激光頻率的穩定性、復現性的定義及影響激光頻率穩定的因素；介紹了常見的穩頻及產生雙頻的方法；分析論證了激光器雙縱模熱穩頻的使用條件和有關參數的關系，得到結論是：應將激光管裝在保溫罩內；選用放電管直徑及長度大、壁厚小、材料導熱系數大的放電管。 -
The mechanism for optical storage in these materials has been attributed to a statistical reorientation of the azobenzene chromophors perpendicular to the polarization of the incident electric field of the pump laser beam. the photoinduced birefringence and holographic storage in methyl orange dyes ( mo ) doped polyvinyl alcohol ( pva ) films were reported firstly in this thesis. the relationship between the photoinduced birefringence and the dye content and pumping power was investigated by using the writing light of 532 nm ( double - frequency of nd : yag laser ) and the reading light of 632. 8 nm
本文研究了甲基橙（ mo ）偶氮苯染料摻雜聚乙烯醇（ pva ）薄膜的光致雙折射和全息光存儲特性，利用yag激光2倍頻（ 532nm ）作為寫入光， he ? ne激光（ 632 . 8nm ）作為讀出光，研究含有不同染料濃度pva薄膜的光致雙折射特性，探討了光致雙折射和泵浦光功率的關系，實現了全息光存儲，所得光柵生長曲線包含快過程和慢過程，快過程以異構相位光柵的生長為主，慢過程以取向光柵的生長為主，對此實驗結果本文給出了合理的理論解釋。 -
The double - frequency laser interferometer belongs to the heterodyne interferometer. it has been proved that this kind of interferometer possesses the advantage of having a higher transform gain, better wave - filter capacity and high spatial resolution. furthermore, this kind of interferometer can filter out background light interference and obtain a measuring signal with high signal / noise ratio
雙頻激光干涉儀是一種外差干涉儀，理論分析證明：外差干涉具有高的轉換增益、良好的濾波性能及優異的空間鑒別能力，能有效地濾除各種背景光干擾，得到信噪比很高的測量信號。 -
The theory research on the location of a frequency doubling crystal in a double - pass intracavity frequency doubling laser
雙程腔內倍頻激光器的諧波晶體腔內位置的理論研究 -
Experiments have demonstrated that, under the condition of constant temperature ( 20 ), the frequency error of double - frequency laser interferometer with two longitudinal modes could be controlled within 10 " 9 even with conditions such as with cool or hot air blowing, it can still be kept within 10 " 7. self - organised fuzzy control methods can be realised in a single - chip processor which contains fuzzy optimisation and self - organisation functions. the above - mentioned system possesses the following advantages : simple
/ znl （式中c為光速， l為諧振腔長， n為空氣折射率，其值約790mhz ） ，原理上對目前可能要求的測量速度都能滿足;它發出的光為一對互相垂直的線偏振光，與塞曼型雙頻激光干涉儀相比，它不用外加軸向磁場及1 / 4波片，因此結構簡單，造價低廉。
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