• Infrared and Laser Engineering
  • Vol. 51, Issue 7, 20210572 (2022)
Shuang Han1,2, Junze Tong1,2, Zhenpeng Wang1,2, Tao Yu1,*, and Yanlin Sui1
Author Affiliations
  • 1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China
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    DOI: 10.3788/IRLA20210572 Cite this Article
    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 Copy Citation Text show less
    Schematic diagram of principle of space gravitational wave detection laser heterodyne interference
    Fig. 1. Schematic diagram of principle of space gravitational wave detection laser heterodyne interference
    Design parameters of the ranging and communication system
    Fig. 2. Design parameters of the ranging and communication system
    (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. 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
    Design scheme of the simulation system of space laser heterodyne interference signal
    Fig. 4. Design scheme of the simulation system of space laser heterodyne interference signal
    (a) FPGA and crystal oscillator unit; (b) DAC unit; (c) DAC back-end analog amplifier circuit
    Fig. 5. (a) FPGA and crystal oscillator unit; (b) DAC unit; (c) DAC back-end analog amplifier circuit
    Comparison diagram of the theory and simulation results of Doppler frequency shift function
    Fig. 6. Comparison diagram of the theory and simulation results of Doppler frequency shift function
    (a) Spectrum diagram of the main signal; (b) Spectrum diagram of the main signal coupled with shot noise
    Fig. 7. (a) Spectrum diagram of the main signal; (b) Spectrum diagram of the main signal coupled with shot noise
    [in Chinese]
    Fig. 7. [in Chinese]
    Schematic diagram of harmonic clutter suppression in the frequency range of 2-20 MHz
    Fig. 8. Schematic diagram of harmonic clutter suppression in the frequency range of 2-20 MHz
    (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
    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
    SignalParametersValuePower portion
    SystemSystem clock70 MHz
    The main signalMain beat-note15 MHz89%
    Sideband beat-notes14, 16 MHz10%
    Sideband modulation index0.45
    Communication modulation index0.2 rad1%
    PRN rate2.2 MHz
    Data rate34 kbps
    Key noiseDoppler shift rate100 kHz/1 ms
    Shot noise55, 75 dB
    Table 1. Simulation parameter of spatial laser heterodyne interference signal
    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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