Shuang Han, Junze Tong, Zhenpeng Wang, Tao Yu, Yanlin Sui. Simulation system of a laser heterodyne interference signal for space gravitational wave detection[J]. Infrared and Laser Engineering, 2022, 51(7): 20210572

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- Infrared and Laser Engineering
- Vol. 51, Issue 7, 20210572 (2022)

Fig. 1. Schematic diagram of principle of space gravitational wave detection laser heterodyne interference

Fig. 2. Design parameters of the ranging and communication system

Fig. 3. (a) Schematic diagram of the basic principles of the DDS; (b) DDS block diagram with parametric modulation function; (c) The output waveform of PR; (d) The output waveform of ROM; (e) The output waveform of DAC; (f) The output waveform of filter

Fig. 4. Design scheme of the simulation system of space laser heterodyne interference signal

Fig. 5. (a) FPGA and crystal oscillator unit; (b) DAC unit; (c) DAC back-end analog amplifier circuit

Fig. 6. Comparison diagram of the theory and simulation results of Doppler frequency shift function

Fig. 7. (a) Spectrum diagram of the main signal; (b) Spectrum diagram of the main signal coupled with shot noise
![[in Chinese]](/Images/icon/loading.gif)
Fig. 7. [in Chinese]

Fig. 8. Schematic diagram of harmonic clutter suppression in the frequency range of 2-20 MHz

Fig. 9. (a) Waveform diagram of the main carrier beat coupled with the two time side-beat; (b) Frequency domain diagram of the main carrier-beat coupled with two time side-beat; (c) Main signal spectrum diagram of heterodyne interference signal; (d) Spectrum diagram of the principal signal coupled with 75 dB shot noise
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Table 1. Simulation parameter of spatial laser heterodyne interference signal

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