中国激光, 2018, 45 (7): 0701004, 网络出版: 2018-09-11
激光器系统声音响应和隔音特性研究 
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Acoustic Response and Sound Insulation Characteristics of Laser System
图 & 表
图 1. 测量声音响应特性的实验装置图
Fig. 1. Experimental setup for measuring response characteristics of sound signals
图 2. 87Rb 5S1/2Fg=2到5P3/2Fe=1,2,3偏振光谱(蓝色实线)以及饱和吸收谱(黑色虚线)
Fig. 2. Polarization spectra (blue solid line) and corresponding saturated absorption spectrum (black dash line) of 87Rb 5S1/2Fg=2 to 5P3/2Fe=1, 2, 3 transitions
图 3. 激光频率在自由运转及频率锁定后的时域起伏。(a)自由运转;(b)频率锁定
Fig. 3. Laser frequency fluctuation in time domain of open loop free-running and closed loop frequency stabilization. (a) Under open loop free-running; (b) after loop frequency closing
图 4. 激光器系统开环及闭环增益的幅频特性 (离散数据点为方波扰动激励的测量结果,黑色实线为SR785的对比测量结果)
Fig. 4. Amplitude-frequency characteristics under open loop and closed loop of laser system. Scatter line shows measured results of square wave modulation and black line shows that of dynamic signal analyzer SR785
图 5. (a)频率为1200 Hz的声致振动激励下激光频率的波动;(b)激光器频率波动信号的频谱
Fig. 5. (a) Laser frequency fluctuation with 1200 Hz sound stimulant signal; (b) frequency spectrum for laser frequency fluctuation signal
图 6. 激光器输出频率波动幅度对不同频率声音激励的响应特性
Fig. 6. Acoustic response characteristics of laser frequency fluctuation to sound stimulant signal
表 1隔音失效的声音波长与机械结构尺寸
Table1. Mechanical structure dimensions with regard to sound wavelengths when the sound insulation is invalid
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王彦华, 秦林, 任欢, 王军民. 激光器系统声音响应和隔音特性研究[J]. 中国激光, 2018, 45(7): 0701004. Yanhua Wang, Lin Qin, Huan Ren, Junmin Wang. Acoustic Response and Sound Insulation Characteristics of Laser System[J]. Chinese Journal of Lasers, 2018, 45(7): 0701004.
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