Infrared and Laser Engineering, Volume. 52, Issue 10, 20230023(2023)
Digital lock-in amplifier controlled by FPGA for spectral measurement
Fig. 2. (a) Sine and cosine reference signal generated based on DDS principle; (b) Waveform changes with frequency
Fig. 3. (a) Amplitude frequency response of improved CIC filter with different integration length; (b) Relation between cut-off frequency of improved CIC filter and integration length
Fig. 5. (a) JPL root of sum of squares; (b) JPL residual; (c) CORDIC root of sum of squares; (d) CORDIC residual
Fig. 10. (a) TDLAS system structure; (b) Experimental device of TDLAS system
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Leilei Zhang, Zhensong Cao, Qing Zhong, Yinbo Huang, Zihao Yuan, Jun Huang, Gang Qi, Wenxue Pan, Xingji Lu. Digital lock-in amplifier controlled by FPGA for spectral measurement[J]. Infrared and Laser Engineering, 2023, 52(10): 20230023
Category: Optical devices
Received: Feb. 25, 2023
Accepted: --
Published Online: Nov. 21, 2023
The Author Email: Lu Xingji (.xjlu@aiofm.ac.cn)