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激光穩頻控制系統仿真與實(shí)驗研究
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China Aerodynamics Research and Development Center,,,,

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國家自然科學(xué)基金項目(面上項目,重點(diǎn)項目,重大項目)


Simulation and Experimental Studies on Laser Frequency Stabilization Control System
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    摘要:

    窄線(xiàn)寬穩頻半導體激光器在干涉測量、光學(xué)頻標、精密光譜測量等研究領(lǐng)域有著(zhù)廣泛的應用。自由運轉的半導體激光器每天的頻率漂移量可以達到GHz,因此研究半導體激光器的穩頻具有十分重要的意義。本文以PDH穩頻為例,基于PLL理論建立了激光穩頻過(guò)程的數學(xué)模型,計算了激光穩頻過(guò)程的誤差傳遞函數。利用Matlab/Simulink搭建了激光穩頻仿真模型,分析了環(huán)境變化時(shí)激光器失鎖機理,結果表明控制電路內部信號可作為失鎖判據。進(jìn)一步利用積分掃描方式搭建了一套激光器穩頻試驗系統,針對環(huán)境因素的變化,對激光器失鎖過(guò)程進(jìn)行了研究,實(shí)驗結果與仿真結果基本一致。同時(shí)在穩頻系統精密控溫的情況下,實(shí)現了對激光器長(cháng)時(shí)間穩頻,其頻率不穩定度小于5MHz。

    Abstract:

    Semiconductor laser with narrow linewidth and high frequency stability has been widely used in interference measurements, optical frequency standard and precision spectroscopy. The daily frequency drift of a free running semiconductor laser can reach GHz level. Therefore, it is very important to study the frequency stabilization of semiconductor laser. In this paper, a mathematical model of laser frequency stabilization control system based on the phase locked loop (PLL) theory is proposed. The principle of lock-lose is been analysed and simulated by employing Matlab/Simulink. The result shows that the internal signal of the control circuit can be applied as the criterion of the lockout. Furthermore, an experimental phase-locking system is built with the integral scanning method to measure the actual locking performance. The good agreement of the results between the experiment and simulation presents that the theoretical model is reliable. Under the condition of precise temperature control, the laser shows excellent long-term frequency stabilities with a instability frequency below 5MHz.

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伍越,陳衛,李澤禹,姚峰,朱濤.激光穩頻控制系統仿真與實(shí)驗研究計算機測量與控制[J].,2018,26(12):111-114.

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歷史
  • 收稿日期:2018-08-06
  • 最后修改日期:2018-09-07
  • 錄用日期:2018-09-10
  • 在線(xiàn)發(fā)布日期: 2018-12-21
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