本文選題：穩(wěn)頻　切入點：外腔半導體激光器　出處：《紅外與激光工程》2017年01期

【摘要】：在銣原子氣室中實現(xiàn)了飽和吸收譜穩(wěn)頻法和消多普勒的雙色譜穩(wěn)頻法,以給在建的原子干涉重力儀系統(tǒng)選擇合適的激光穩(wěn)頻方法。介紹了兩種穩(wěn)頻方法的基本原理及實驗細節(jié)。通過調整光路設計、自制低噪聲光電探測器以及應用數字鎖定模塊,獲得了良好的鑒頻誤差信號。每種方法都搭建了兩套穩(wěn)頻系統(tǒng)并在3000s采集時間內保持鎖定。激光器在經飽和吸收法和消多普勒雙色譜法鎖定后,激光頻率波動分別為16.2kHz和31.4kHz,相應于在10s采樣時間下分別獲得4.21×10~(-11)和8.18×10~(-11)的頻率穩(wěn)定度;相比之下,激光器自由運轉時,頻率波動和穩(wěn)定度分別為629kHz和1.64×10-9。在原子重力儀系統(tǒng)小型化的需求下詳述了兩種穩(wěn)頻方法的優(yōu)缺點,比較而得消多普勒的雙色譜穩(wěn)頻法在原子干涉重力儀的小型化模塊化發(fā)展方向不失為具有潛力的一種選擇。
[Abstract]:The saturated absorption spectrum method and dual-chromatographic frequency stabilization method are realized in rubidium atomic gas chamber to select suitable laser frequency stabilization method for the system of atomic interference gravimeter under construction.The basic principle and experimental details of two frequency stabilization methods are introduced.By adjusting the design of optical path, self-made low noise photodetector and digital locking module, a good frequency discrimination error signal is obtained.In each method, two stable frequency systems were built and locked in 3 000 s.The laser frequency fluctuation is 16.2kHz and 31.4kHz after the laser is locked by saturated-absorption method and dual-chromatographic method, respectively, corresponding to the frequency stability of 4.21 脳 10 ~ (-11) and 8.18 脳 10 ~ (10) ~ (-11) laser at 10 s sampling time respectively, in contrast, when the laser is in free operation,The frequency fluctuation and stability are 629kHz and 1.64 脳 10-9, respectively.Under the demand of miniaturization of atomic gravimeter system, the advantages and disadvantages of two frequency stabilization methods are described in detail. Compared with the dual-chromatographic frequency stabilization method without Doppler, it is a potential choice for the miniaturization and modularization of atomic gravimeter.
【作者單位】： 北京長城計量測試技術研究所計量與校準技術國防科技重點實驗室;
【基金】：國防軍工技術基礎項目(JSJC20122205C001)
【分類號】：TN248.4

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本文編號：1713232