激光頻率穩定 的英文怎麼說
中文拼音 [jīguāngbīnlǜwěndìng]
激光頻率穩定
英文
frequency stabilization of laser- 激 : Ⅰ動詞1 (水因受到阻礙或震蕩而向上涌) swash; surge; dash 2 (冷水突然刺激身體使得病) fall ill fr...
- 光 : Ⅰ名詞1 (照耀在物體上、使人能看見物體的一種物質) light; ray 2 (景物) scenery 3 (光彩; 榮譽) ...
- 頻 : Ⅰ形容詞(次數多) frequent Ⅱ副詞(屢次) frequently; repeatedly Ⅲ名詞1 [物理學] (物體每秒鐘振動...
- 率 : 率名詞(比值) rate; ratio; proportion
- 穩 : 形容詞1 (穩定; 穩當) steady; stable; firm 2 (穩重) steady; staid; sedate 3 (穩妥) sure; rel...
- 定 : Ⅰ形容詞1 (平靜; 穩定) calm; stable 2 (已經確定的; 不改變的) fixed; settled; established Ⅱ動詞...
- 激光 : [物理學] laser 激光靶 laser target; 激光報警器 laser avoidance device; 激光玻璃纖維 laser fibre; ...
- 頻率 : frequency; rate
- 穩定 : 1 (使穩定) stabilize; steady 2 (穩固安定) stable; steady 3 (物質的性能不易改變的作用) stabi...
-
It is discoverde that with a looped feedback circuit, the dds acousto - optic mode locking has the function of tracking the frequency interval of the laser resonator longitudinal mode, and stabilizing the quality of the laser beams
Dds聲光鎖模器在增加閉環反饋環路后,可以跟蹤激光諧振腔縱模頻率間隔變化,穩定激光光束輸出質量。Study on the frequency stability problem of sal
合成孔徑激光雷達頻率穩定性問題研究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。The efficient sppc had been performed with 1 - hz - repetition - rate 532nm nanosecond pulses, in which phase conjugate reflectivity as high as 21. 5 % was obtained. when sppc were operated in ce : batio3 with 532nm, 632. 8nm and 790nm cw lasers, the maximum sppc reflectivity of 54. 1 %, 88. 2 % and 80. 5 % were obtained, respectively. unlike the results reported before that four - wave mixing by stimulated photorefractive backscattering ( spb - fwm ) only exists at short wavelengths while four - wave mixing by total internal reflection ( tir - fwm ) only exists at long wavelengths, both of these two mechanisms coexist at all wavelengths from 532nm to 790nm in our experiments
通過大量的實驗全面研究了ce : batio _ 3自泵浦位相共軛特性:在低重復頻率( 1hz ) 、 532nm調q激光泵浦時最高獲得了21 . 5的位相共軛反射率,而此前報道過的建立位相共軛脈沖光最低重復頻率是10hz ;實驗中發現在532nm 790nm波長范圍內,在不同的波長激光泵浦時,同時存在兩種自泵浦位相共軛機制:全內反射?四波混頻( tir - fwm )和受激背向散射?四波混頻( spb - fwm ) ;在連續激光泵浦時,對532nm 、 632 . 8nm和790nm三種波長,最高分別獲得了54 . 1 、 88 . 2和80 . 5的位相共軛反射率;同時還研究了自泵浦位相共軛光的時間穩定性。The stability output second harmonic generation ( shg ) experiment results of single - longitudinal mode and multi - longitudinal mode with long cavity were explained reasonably with these rate equations. the high polarization of fundamental wave in the isotropic laser media nd : yag with type - i critical phase - matching lbo was studied with the rate equations including polarization of fundamental light. using the polarization function of lbo, a quartz full - wave plate was introduced into the cavity, a kind of birefringent filter by considering the combination of the polarization function of the type - i critical phase - matching doubling frequency crystal lbo and the quartz whole - wave plate was constructed
將腔內多縱模倍頻速率方程推廣應用到準三能級藍光激光器中,分析了一個縱模、兩個縱模、多個縱模時的噪聲情況,合理地解釋了實驗中激光器單縱模運轉以及長腔多縱模運轉時穩定輸出的實驗現象,同時利用該速率方程分析了以各向同性激光晶體nd : yag為工作物質,類臨界相位匹配lbo為倍頻晶體的藍光激光器中基頻光偏振特性,合理利用類臨界相位匹配lbo倍頻晶體的偏振特性與引入的石英晶體全波片構成雙折射濾光片,通過選單頻來抑制噪聲,獲得了藍光低噪聲的穩定輸出。According to the guidline, two nd : yag lasers have been designed and set up, one is end - pumped by lower output power ld using a selfoc micro lens, and the other is end - pumped by high output power ld using a pair of lenses are designed, and the characteristics such as output power and power stabilization of both solid - state lasers are investigated. thirdly, when an empty liquid crystal cell is inserted in the cavity of the nd : yag laser pumped by high power ld, the laser can operates in single axial mode. finally, according to the relationship between the laser output power and the longnitudinal a ld - end - pumped nd : yag laser sensor for displacement measurement has been investigated theoretically and demonstrated experimently, the results indicate that when the mean radius of pumping inside the laser cavity is far less than that of the oscilating laser mode, the exponential of the output power is a gauss function of the longitudinal positon of focused spot of ld pumping beam, both the measurement range and the sensitivity are dependent on the incident pumping power, as the incident pumping power is increased, the measurement range is enlarged and the sensitivity is improve d
本文首先介紹了ld泵浦nd : yag激光器的發展狀況、主要特性及其應用,從四能級速率方程出發,推導了ld泵浦nd : yag激光器的閾值、輸出功率和斜效率的表達式,並簡述了激光器的工作原理、結構型式和倍頻方法;其次,以空間相關的速率方程為基礎,提出了ld端面泵浦nd : yag激光器的設計方法,給出了一定泵浦耦合方式下,振蕩光模尺寸、最佳輸出耦合率、泵浦光模尺寸、泵浦光焦斑位置等參數的選取依據,以此為依據,設計了自聚焦透鏡耦合小功率ld泵浦nd : yag激光器和透鏡組耦合高功率ld泵浦nd : yag激光器,對激光器的輸出功率和功率穩定性等特性進行了實驗研究;再次,在帶尾纖輸出的高功率ld泵浦nd : yag激光腔內插入一隻空液晶盒,觀察到了激光器以單縱模運轉;最後,根據泵浦光焦斑端面位置對激光輸出功率的影響規律,提出了ld端面泵浦nd : yag激光位移傳感新方法,並進行了理論和實驗研究,研究結果表明:當激光晶體內泵浦光平均光斑半徑遠小於振西安理工大學碩士學位論文蕩光束腰半徑時,激光輸出功率的自然指數與泵浦光焦斑的縱向位置成高斯變化規律,測量范圍和靈敏度依賴于泵浦功率,隨著泵浦功率的增加,測量范圍擴大,靈敏度提高,當端面泵浦功率為7 . 24w (最大輸出功率為1 . 926w )時,激光位移傳感器的測量范圍和靈敏度分別是13 . 045mm和0 . 148mw / pm 。All - solid - state laser is an advantage lamp - house. it has many important applications and potential commercial value in many fields, such as industry, scientific research, military. so it ' s always the research focus of laser field. diode end - pumped solid - state laser has many merits. including high efficiency, long lifetime, high frequency stability, narrow line width, compact configuration, convenient for use et al, which made her a necessity in many high level quantum optics experiments. in this thesis, a series of experiment research was done with regard to blue laser, green laser and infrared laser
激光二極體端面泵浦的固體激光器具有效率高、譜線窄、壽命長、結構簡單、使用方便等優點,特別是採用環行諧振腔內加光學單向器構成的單頻激光器,由於頻率穩定,使其成為許多高水平量子光學實驗的主要光源。本論文圍繞全固態單頻藍,綠,紅外激光器進行了一系列實驗研究工作。The nonuseful loss of cavity were got by measuring the threshold of laser under the different output mirrors. the loss was caused by prague angle unmatching. 3. the pulse train with minor pulse width 22ns and frequency 23khz, peak power 3. 5kw were obtained in cr4 " : yag passively q - switch experience. the stability of pulse is 6 %
( 3 )實現了在大功率泵浦、無水冷的情況下cr ~ ( 4 + ) : yag飽和吸收體被動調q ,得到了最小脈寬為22ns 、重復頻率為23khz 、峰值功率為3 . 5kw的激光脈沖輸出,脈沖的穩定性為6 。In mis thesis, we report a laser with maximum output of 4. 16w, intensity fluctuation less than 0. 5 % ( rms ) in an hour, and frequency noise less than 340khz
本文報道了單頻輸出4 . 16w ,長期功率波動范圍小於0 . 5 ,頻率穩定性優於340khz的激光器。Using fiber grating to substitute traditional wavelength - selecting components, the 8nm tuning range is realized at a repetition frequency of 2. 5ghz. ( 5 ). the wavelength - tuning methods of an active mode - locked fiber laser using a ld as a modulator are researched, and two tuning methods including temperature tuning
( 4 )對主動鎖模光纖激光器的波長調節技術進行了研究,用光纖光柵代替傳統的波長選擇器件實現了主動鎖模光纖激光器的波長調諧,並獲得了波長連續調諧范圍達8nm 、重復頻率2 . 5ghz的穩定的光脈沖輸出。The actively mode - locked erbium doped fiber laser is very attractive among those potential sources which can generate broadband tunable near transform - limited pulse with high repetition rate and has been used as the ideal optical transmitter and all optical clock source in the future long - distance communication systems
對于高速光纖通信系統而言,能輸出高重復頻率的、近極限超短脈沖的主動鎖模光纖激光器被認為是未來遠程無中繼光纖通信系統的理想光源。但其難點是工作穩定性問題。Laser - diode end - pumped solid - state laser has many advantages, including high efficiency, good beam quality, high frequency stability, narrow line width, long lifetime, compact configuration, convenient for using et al. especially, single - frequency solid - state laser sources are required for many fields of fundamental research and scientific application, such as gravity - wave detection, coherent laser radar, coherent communication and fiber sensing
激光二極體泵浦的固體激光器具有全固態、小型化、效率高、使用方便等優點而受大家的廣泛關注,尤其是實現單頻運轉的全固態激光器以其優良的頻率特性和輸出功率穩定性可廣泛應用在相干信息處理、頻率計量、量子光學、引力波測量和量子信息等研究領域。By means of controlling accurately temperature of f - p cavity used in the frequency - stabilizing system of laser, the frequency stability of laser is significantly improved. especially the long - term unidirectional frequency shift is essentially overcome
從實驗結果,我們得出將作為頻率標準的f ? p腔精密控溫與對該腔不控溫對激光器振蕩頻率進行鎖定的結果相比較,清楚看到短期穩定性有一定提高,重要是對作為穩頻標準f ? p腔精密控溫,消除了由於溫度變化引起的頻率慢漂移。In this paper, we study inversionless lasing of frequency up - conversion in an open v - type system with incoherent pump. making theoretical analysis and numerical calculation by density - matrix equations of motion, we derive the conditions for the onset of lwi and discuss the effects of the parameters of the system, the detuning of driving field and probe field on the gain, and discuss nonlinear effect in the frequency up - conversion regime. we also give stability and transient analysis
本論文研究了具有非相干泵浦的開放v型系統頻率上轉換無粒子數反轉激光,利用密度矩陣運動方程,通過理論分析和數值計算,得出該系統產生無粒子數反轉激光的條件,討論系統各參數的變化和驅動場與探測場的失諧對激光增益、色散和粒子數差的影響,還討論了頻率上轉換區域的非線性效應,分析了增益的穩定性及系統的瞬態演化過程。The prerequisite of actively mode - locked fiber laser stable work is that the modulation signal frequency must be the integral multiple to the cavity resonance frequency
主動鎖模光纖激光器穩定工作的前提條件之一是調制信號頻率應為腔內縱模間隔的整數倍。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 concept of viffoal laser frequency stabilizaion is put fowi. the frequency stabilizaion at the center of doppler curve has been realized aller signal detecting, phase sensitive detecting, integrating and high voltage amplifying circuits with fm spectroscopy a frequency stability of l0 -, has been obtained with a reproducibility of l0 - 9. hyperfine spectra of, ', i, near 532nm have been studied via modul8tion tfansfer spectroscopy
利用fm光譜法將激光單次通過碘吸收室進行線性吸收,再經信號檢測、混頻、積分和高壓放大等伺服電路,實現了在多普勒曲線中心處的頻率穩定,頻率穩定度和復現性可達10 ~ ( - 9 )量級。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。3. ) designing and completing the cw yvo4 / ktp laser of the whole cavity with watt level. and obtaining the 1. 3w green laser of single - frequency operation, the fluctuations of the laser ' s power is less than 1. 5 % ( 3 hour ), when the laser is free running
3 )試制了整體腔瓦級連續單頻綠光激光器,獲得1 . 3w穩定的單頻綠光輸出,單頻綠光激光器的長期功率穩定度小於1 . 5 ( 3小時) 。Laser diode end pumped solid - state laser has many advantages, including high efficiency, high frequency stability, narrow fine width, long lifetime, compact configuration, convenient for use et al, which made her a necessity in many high level quantum optics experiments
激光二極體端面泵浦的固體激光器具有效率高,頻率穩定,譜線窄,壽命長,結構簡單,使用方便等優點,使其成為許多高水平的量子光學實驗的主要光源。分享友人