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Laser & Optoelectronics Progress, Volume. 59, Issue 19, 1906004(2022)

Generation Technology of High-Frequency and Large Time Bandwidth Product Linear Frequency Modulation Signal

Yuhua Xing and Qinlin Duan*
Author Affiliations
  • School of Automation and Information Engineering, Xi'an University of Technology, Xi'an 710048, Shaanxi, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (14)
    Equations (24)
    References (20)
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    Figures & Tables(14)
    Principle block diagram of high frequency LFM signal generation system

    Fig. 1. Principle block diagram of high frequency LFM signal generation system

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    Bessel function curve of order n

    Fig. 2. Bessel function curve of order n

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    Normalized parabola signal

    Fig. 3. Normalized parabola signal

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    Output signal spectrum of DPMZM modulator. (a) Output spectrum of DPMZM1; (b) output spectrum of DPMZM2

    Fig. 4. Output signal spectrum of DPMZM modulator. (a) Output spectrum of DPMZM1; (b) output spectrum of DPMZM2

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    Normalized parabolic electrical signal. (a) Parabolic signal; (b) spectrum diagram; (c) autocorrelation function

    Fig. 5. Normalized parabolic electrical signal. (a) Parabolic signal; (b) spectrum diagram; (c) autocorrelation function

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    After quadrupling in time domain stretching. (a) Parabolic signal; (b) spectrum diagram; (c) autocorrelation function

    Fig. 6. After quadrupling in time domain stretching. (a) Parabolic signal; (b) spectrum diagram; (c) autocorrelation function

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    After 4-bit phase encoding processing. (a) Parabolic signal; (b) spectrum diagram; (c) autocorrelation function

    Fig. 7. After 4-bit phase encoding processing. (a) Parabolic signal; (b) spectrum diagram; (c) autocorrelation function

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    After segmentation. (a) Parabolic signal; (b) spectrum diagram; (c) autocorrelation function

    Fig. 8. After segmentation. (a) Parabolic signal; (b) spectrum diagram; (c) autocorrelation function

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    Combination of segmentation and phase encoding processing. (a) Parabolic signal; (b) spectrum diagram; (c) autocorrelation function

    Fig. 9. Combination of segmentation and phase encoding processing. (a) Parabolic signal; (b) spectrum diagram; (c) autocorrelation function

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    Trend of OSSR with different modulation indices

    Fig. 10. Trend of OSSR with different modulation indices

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    Trend of RFSSR with different modulation indices

    Fig. 11. Trend of RFSSR with different modulation indices

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    Effect of phase shift on OSSR

    Fig. 12. Effect of phase shift on OSSR

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    Effect of phase shift on RFSSR

    Fig. 13. Effect of phase shift on RFSSR

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    • Table 1. Parameter comparison of LFM signal

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      Table 1. Parameter comparison of LFM signal

      RF drive signal processingBandwidthTime-widthTBWP
      Anti -chemical parabolic signalBTc8 nm/π
      Stretch m times on time domainB/KKTc8 nm/π
      M-bit phase encodingBMTc8 nmM/π
      Divided into N sectionsNB/2Tc4 nmN/π
      Divided into N section+M-bit phase encodingNB/2MTc4 nmNM/π
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    Yuhua Xing, Qinlin Duan. Generation Technology of High-Frequency and Large Time Bandwidth Product Linear Frequency Modulation Signal[J]. Laser & Optoelectronics Progress, 2022, 59(19): 1906004

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    Paper Information

    Category: Fiber Optics and Optical Communications

    Received: Jun. 29, 2022

    Accepted: Aug. 4, 2022

    Published Online: Oct. 11, 2022

    The Author Email: Duan Qinlin (duanqinlin0913@163.com)

    DOI:10.3788/LOP202259.1906004

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology