發(fā)布時間：2018-12-26 16:37

【摘要】：光電檢測設(shè)備在國防與民用領(lǐng)域上有著巨大的需求。而激光器作為光電檢測設(shè)備的重要組成部分,其光功率輸出是否穩(wěn)定對光電設(shè)備的穩(wěn)定性與精確度影響巨大。光功率的輸出是否穩(wěn)定是光電設(shè)備的性能判斷的依據(jù)。因此,記錄激光器的光功率輸出數(shù)據(jù),分析數(shù)據(jù)的變化規(guī)律,將會使安裝此激光器的光電檢測設(shè)備的調(diào)試與標定更加高效。同時還能為光電檢測設(shè)備的性能優(yōu)化與提升提供重要的參考依據(jù)。本論文討論了如何搭建一種用于實時監(jiān)測激光器光功率輸出,并記錄光功率數(shù)值的系統(tǒng)。用戶通過該系統(tǒng)可以實時查看激光器的光功率數(shù)值,并分析這些數(shù)據(jù)的變化規(guī)律。該監(jiān)測系統(tǒng)由光電二極管采集電路、放大電路、單片機系統(tǒng)構(gòu)成。該系統(tǒng)的信號抗干擾能力和去噪能力強,能夠24小時實時監(jiān)測激光器的光功率變化趨勢,記錄光功率值。并且同時通過串口輸出數(shù)據(jù),方便用戶對數(shù)據(jù)進行分析查詢。本文詳細描述了光電二極管接收電路的組成與原理,討論了對接收電路進行優(yōu)化和性能提升的方法。分析了放大電路的選型和構(gòu)成,以及對信號進行抗干擾的處理。論述了信號的后續(xù)處理模塊:通過AD轉(zhuǎn)換電路,轉(zhuǎn)換光電信號并輸出給單片機,單片機將數(shù)值存儲在FLASH內(nèi)以供查詢,并將測量結(jié)果在液晶顯示屏上顯示出來。本文分析了電腦端程序設(shè)計,通過單片機的串口將數(shù)值讀出,并存儲記錄數(shù)據(jù)。此外,本文還討論了對該系統(tǒng)進行簡單標定的方法,保證該系統(tǒng)能夠進行正常工作。系統(tǒng)能夠24小時連續(xù)對信號進行監(jiān)測,在PC端實時觀測記錄光功率的值,測試光的波長為780nm,光功率的測量精度為0.01dBm,測量范圍為-20~10dBm,達到了設(shè)計要求。測試結(jié)果表明,半導體激光器的光功率會隨時間的變化而變化,注入的能量越來越多的轉(zhuǎn)換為熱能,其輸出的光功率也會不斷的變小。
[Abstract]:Photoelectric detection equipment has a huge demand in the field of national defense and civil. As an important part of photoelectric detection equipment, the stability of optical power output of laser has a great influence on the stability and accuracy of photoelectric equipment. Whether the output of optical power is stable is the basis for judging the performance of optoelectronic equipment. Therefore, recording the output data of the laser and analyzing the variation of the data will make the debugging and calibration of the photoelectric detection equipment installed with the laser more efficient. At the same time, it can provide important reference for the performance optimization and promotion of photoelectric detection equipment. This paper discusses how to set up a system for real-time monitoring laser optical power output and recording optical power values. Through the system, users can view the optical power of laser in real time, and analyze the variation of these data. The monitoring system is composed of photodiode acquisition circuit, amplifier circuit and single-chip microcomputer system. The system has strong ability of anti-jamming and de-noising. It can monitor the change trend of laser power in real time and record the value of optical power in 24 hours. And at the same time output data through the serial port, convenient for users to analyze and query the data. In this paper, the composition and principle of photodiode receiving circuit are described in detail, and the methods of optimizing and improving the performance of the receiving circuit are discussed. The selection and composition of amplifying circuit and the anti-interference processing of signal are analyzed. The following processing module of the signal is discussed: the photoelectric signal is converted and output to the single chip microcomputer through the AD conversion circuit, the value of the signal is stored in the single chip computer in FLASH for inquiry, and the measurement result is displayed on the liquid crystal display screen. This paper analyzes the program design of the computer, reads out the numerical value through the serial port of the single chip microcomputer, and stores the recorded data. In addition, the simple calibration method of the system is discussed to ensure that the system can work normally. The system can continuously monitor the signal in 24 hours, and record the optical power in PC. The wavelength of the light is 780nm, the measuring precision is 0.01dBmand the measuring range is -20dBm. it meets the design requirements. The experimental results show that the optical power of the semiconductor laser will change with time, the injected energy will be converted to heat energy more and more, and the output optical power will become smaller and smaller.
【學位授予單位】：蘇州大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN248

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本文編號：2392393