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    Journals >Laser & Optoelectronics Progress >Volume 57 >Issue 17 >Page 170603 > Article
    • Laser & Optoelectronics Progress
    • Vol. 57, Issue 17, 170603 (2020)
    Reconfigurable Triangular and Square Waveforms Generation Using Optical Polarization Division Modulation
    Kun Zhang1、2、**, Shanghong Zhao1、*, Wei Jiang1、2, Tao Lin1, Guodong Wang1, and He Li1
    Author Affiliations
  • 1College of Information and Navigation, Air Force Engineering University, Xi'an, Shaanxi, 710077, China
  • 2China Academy of Space Technology (CAST)-Xi'an, Xi'an, Shaanxi, 710077, China
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    DOI: 10.3788/LOP57.170603 Cite this Article Set citation alerts
    Kun Zhang, Shanghong Zhao, Wei Jiang, Tao Lin, Guodong Wang, He Li. Reconfigurable Triangular and Square Waveforms Generation Using Optical Polarization Division Modulation[J]. Laser & Optoelectronics Progress, 2020, 57(17): 170603 Copy Citation Text show less
    Schematic of the triangular and square waveforms generator
    Fig. 1. Schematic of the triangular and square waveforms generator
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    Optical generator of triangular waveform with fundamental frequency. (a) Optical spectrum after polarizer; (b) electrical spectrum from PD; (c) generated triangular waveform at 0 to 0.5 ns; (d) generated triangular waveform at 0 to 10 ns
    Fig. 2. Optical generator of triangular waveform with fundamental frequency. (a) Optical spectrum after polarizer; (b) electrical spectrum from PD; (c) generated triangular waveform at 0 to 0.5 ns; (d) generated triangular waveform at 0 to 10 ns
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    Optical generator of square waveform with fundamental frequency. (a) Optical spectrum after polarizer; (b) electrical spectrum from PD; (c) generated square waveform at 0 to 0.5 ns; (d) generated square waveform at 0 to 10 ns
    Fig. 3. Optical generator of square waveform with fundamental frequency. (a) Optical spectrum after polarizer; (b) electrical spectrum from PD; (c) generated square waveform at 0 to 0.5 ns; (d) generated square waveform at 0 to 10 ns
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    Impact of amplitude drift on generation of the triangular waveform and square waveform with fundamental frequency. (a) Triangular waveform; (b) square waveform
    Fig. 4. Impact of amplitude drift on generation of the triangular waveform and square waveform with fundamental frequency. (a) Triangular waveform; (b) square waveform
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    Optical generator of triangular waveform with double frequency. (a) Optical spectrum in x-polarization; (b) optical spectrum in y-polarization; (c) electrical spectrum from PD; (d) generated triangular waveform at 0 to 0.5 ns; (e) generated triangular waveform at 0 to 10 ns
    Fig. 5. Optical generator of triangular waveform with double frequency. (a) Optical spectrum in x-polarization; (b) optical spectrum in y-polarization; (c) electrical spectrum from PD; (d) generated triangular waveform at 0 to 0.5 ns; (e) generated triangular waveform at 0 to 10 ns
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    Optical generator of square waveform with double frequency. (a) Optical spectrum in x-polarization; (b) optical spectrum in y-polarization; (c) electrical spectrum from PD; (d) generated square waveform at 0 to 0.5 ns; (e) generated square waveform at 0 to 10 ns
    Fig. 6. Optical generator of square waveform with double frequency. (a) Optical spectrum in x-polarization; (b) optical spectrum in y-polarization; (c) electrical spectrum from PD; (d) generated square waveform at 0 to 0.5 ns; (e) generated square waveform at 0 to 10 ns
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    Impact of amplitude drift on generation of the triangular waveform and square waveform with double frequency. (a) Triangular waveform; (b) square waveform
    Fig. 7. Impact of amplitude drift on generation of the triangular waveform and square waveform with double frequency. (a) Triangular waveform; (b) square waveform
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    Modulation index(error percent)1.4345(-5%)1.472(-2.5%)1.510(0%)1.548(2.5%)1.586(5%)
    RMSE0.0400.0380.0360.0370.039
    DC phase shift(error percent) /(°)85.5(-5%)87.75(-2.5%)90(0%)92.25(2.5%)94.5(5%)
    RMSE0.0410.0370.0360.0380.041
    Table 1. RMSE of modulation indices and phase shifts for triangular waveform with fundamental frequency
    Modulation index(error percent)2.185(-5%)2.242(-2.5%)2.300(0%)2.358(2.5%)2.415(5%)
    RMSE0.3390.3360.3350.3370.339
    DC phase shift(error percent) /(°)85.5(-5%)87.75(-2.5%)90(0%)92.25(2.5%)94.5(5%)
    RMSE0.3430.3390.3350.3380.342
    Table 2. RMSE of modulation indices and phase shifts for square waveform with fundamental frequency
    Modulation index(error percent)1.805(-5%)1.853(-2.5%)1.900(0%)1.948(2.5%)1.995(5%)
    RMSE0.0410.0370.0320.0330.034
    DC phase shift(error percent) /(°)171(-5%)175.5(-2.5%)180(0%)184.5(2.5%)189(5%)
    RMSE0.0450.0380.0320.0380.045
    Table 3. RMSE of modulation indices and phase shifts for triangular waveform with double frequency
    Modulation index(error percent)2.09(-5%)2.145(-2.5%)2.2(0%)2.255(2.5%)2.31(5%)
    RMSE0.3470.3400.3340.3350.335
    DC phase shift(error percent) /(°)171(-5%)175.5(-2.5%)180(0%)184.5(2.5%)189(5%)
    RMSE0.3450.3410.3340.3390.345
    Table 4. RMSE of modulation indices and phase shifts for square waveform with double frequency
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    Kun Zhang, Shanghong Zhao, Wei Jiang, Tao Lin, Guodong Wang, He Li. Reconfigurable Triangular and Square Waveforms Generation Using Optical Polarization Division Modulation[J]. Laser & Optoelectronics Progress, 2020, 57(17): 170603
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