optical feedback 中文意思是什麼
optical feedback
解釋
光反饋-
In part two, the optical spatiotemporal pattern in ring optic cavity is investigated. using delay feedback with spatial perturbation method, the system shows roll, square, hexagon, homocentric circle, " honeycomb " and " snowflower " pattern with different spatial perturbation functions. different patterns can be coexist and compete each other with the same perturbation function, which is the new character of this optical system with delay feedback
第二部分，利用延時反饋的空間微擾方法研究了環形腔中二能級介質的光學時空斑圖的控制，在不同的微擾函數作用下，出現了滾筒狀、四方形、六角形、蜂窩狀、同心圓以及「雪花」狀等不同的斑圖，並且在相同的微擾函數下張勝海:博士學位論文出現了不同斑圖之間的競爭，這種競爭是我們發現的這一具有空間微擾的延時反饋非線性光學系統光學斑圖的新特徵。 -
A new laser source of optical communication, erbium - ytterbium codoped phosphate glass waveguide laser that was provided with more prominent performance than semiconductor distribution feedback ( dfb ) laser, has been investigated globally from 1990s. the laser can meet many rigorous demands of wdm systems. the 1. 54 m laser emitted by the laser accords with the interrelated standard of international telecommunications union ( itu ), therefore, a splendent foreground can be predicted about this kind of laser in future optical communication
基於鉺、鐿摻雜磷酸鹽玻璃基片的光波導激光器是一種新型通信光源，具有傳統的分佈反饋半導體激光器所不能比擬的優點，能滿足波分復用/密集波分復用技術對光源提出的諸多高新要求，所發射的1 . 54 m激光符合國際電信聯盟規范，在未來光通信中有著廣闊的發展前景。 -
An intensity modulated fiber optic micro - accelerometer with a digitally feedback circuit is designed. this sensor employs a graded index lens with a reflective coating on one end and measures the relative displacement between the lens and a pair of optical fibers
在本系統中設計了脈沖數字式再平衡迴路，使得該微型光纖加速度傳感器和一般的光纖傳感器相比，又具有動、靜態性能較好，精度、穩定性較高等優點。 -
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 optical feedback self - mixing model is studied when the external cavity of a semiconductor laser suffers a harmonic vibration
摘要在外腔簡諧振動條件下，研究半導體激光器的光反饋自混合干涉系統模型中的測量參數。 -
Theoretical model of self - mixing interference in a linear frequency modulated laserdiode is presented by using the dynamic theory of semiconductor laser with weak external optical feedback. the characteristics of oscillation frequency shift and output power changes of the laser diode are analyzed by using the theoretical model. the absolute distance from front facet of laser diode to target can be found by measuring spectrum of output power of the laser diode
使用半導體激光器在弱反饋條件下的動力學理論，建立了線性調頻半導體激光器的自混頻干涉理論模型.基於該模型，分析了激光器振蕩頻率偏移與輸出功率變化特性.通過測量激光器輸出功率譜，可以得到激光器前端面與被測目標之間的距離 -
The main performances of the afm were in the advanced level around the world. the probe unit of the horizontal afm includes a photo - electronic detection unit with a particular optical - beam - deflection path, a regulating block of the setpoint of imaging force, the xy scanner and z feedback controller, the coarse adjusting and fine adjusting mechanism for the sample approaching to the probe tip. the powerful circuits of preamplifier, as well as the circuits of xy scanner and z feedback controller were developed
成功研製了臥式afm探頭，包括特有的微懸臂偏轉量的臥式光電檢測系統、 afm成像工作點（即原子力的預設置點）的調節機構、 jy }藝掃描與反饋控制器、樣品的粗調與微調機構;自行研製了高性能的psd前置放大電路、 xy掃描控制電路和z向pid反饋控制電路系統;設計了a / d & d / a控制介面，獨立開發了性能完善的afm掃描與控制軟體系統及功能強大的圖像處理軟體系統。 -
This phenomenon is called as self - mixing effect, in which the reflected light carries some information of the external target. the self - mixing effect comes from the optical feedback effect. people always tried to eliminate the optical feedback effect previously
激光的自混合效應來源於激光器的外部光反饋效應，以前人們總是設法消除光反饋的影響，后來逐漸的由消除光反饋的不利影響到主動利用光反饋效應檢測物理量，從而形成了一門新的技術。 -
To compensate for low - frequency drift of the optical path - length difference and to keep the operation point on the most sensitive point, the reference mirror is adjusted with a actuator driven by a feedback loop
為了補償光程差的低頻漂移，將工作點穩定在靈敏度最高點，使用一個反饋控制系統驅動微位移器調整參考平面鏡。 -
By using a new optical input power level detection and signal treatment method to control the gain of the receiver and keep its output level within the required range, a novel feedforward agc optical receiver without radio frequency feedback circuits is realized
我們採用一種入射光功率電平檢測與處理的新方法，對模擬光接收機的增益進行控制，將接收機輸出電平控制在要求的范圍內，實現了一種新型的無射頻反饋電路的自動增益控制光接收機。 -
The problem of self - mixing interference stems from the optical feedback effect
激光自混合干涉問題源於激光器外部光反饋效應。 -
The simulation results show that multiple parameter sensing can be based on the optical feedback self - mixing effect
結論表明，利用光反饋自混合干涉效應可以進行多參數傳感測量。 -
The principle and realization of auto - coupling system for single - mode pof and silica fiber is introduced in this paper. in this system, from analyzing the feedback data of optical power and picture, two fibers can be accurately coupled
在耦合系統中，上位機控制部分利用光功率計和採集圖像的反饋數據，根據一定演算法對該數據進行分析，從而驅動步進電機，使兩光纖達到精確耦合。 -
A stabilization experiment is completed on a one degree - of - freedom rotational bed with fiber optical gyroscope ( fog ) feedback
建立了一套單軸慣性穩定轉臺系統，使用光纖陀螺測速反饋的方式進行了轉臺的穩定實驗。 -
Moreover, the thesis emphasis on designing the servo system of the stabilized platform and provide the experimental result. combining the requirement and concerned optical mechanism, in the research this paper design the hardware of the servo system and establish the system module on the basis of analyzing control theories and summarizing various control methods. it gives pid rectifying for the velocity inner link and compound control ( forward + feedback ) rectifying for the position link
在平臺穩定伺服系統研究中，結合相關的光學機械結構，設計了控制系統的硬體，並在此基礎上從控制理論分析入手，在總結了各種控制方法的基礎上，建立了本系統的數學模型，以速度內環採用pid校正，位置環採用前饋+反饋的復合控制方案實現對伺服系統的控制，並經雙線性變換離散化，推導出系統校正的狀態方程。 -
In the experiments, the phenomenon of the fringe frequency doubled we observed, ha hind that the resolution of the optical feedback system we doubled and the sensitivity of din optical feedback system we also improved after the modes competition between both the polarized light beams
結果表明，光回饋系統解析度提高了1倍，同時利用雙頻激光器兩垂直偏振光間的模競爭，使得倍頻條紋的調制幅度明顯增大，從而使得光回饋系統的靈敏度大大提高。 -
Then, the properties for single - mode pof or bragg grating of pof can be tested. the system consists of four parts : pc control part ( heart part ), three - dimension moving platform, feedback of optical power, and feedback of picture
整個自動耦合系統主要包括四大部分：上位機控制部分、三維高解析度微位移平臺、光功率計反饋部分、圖像採集反饋部分，其中上位機控制部分是整個系統的核心。 -
Compared with mechanics - electricity feedback control method, laser diode feedback control method and optical bistable equipment control method, the circuit is relatively simple, furthermore, simply adjust the optical system to increase the number of pixel corresponding to the interference pattern width, which will promote the control precision of the system
和已有的機電反饋控制方法、半導體激光器反饋控制方法、光學雙穩裝置控制方法相比，電路較為簡單，而且，簡單地調節光學系統使干涉條紋寬度對應的象素數增大，即可提高系統的控制精度。
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