Yuefeng Qi, Yulin Wang, Yicheng Zhu, Zixiong Yang, Tian Li, Zhuoran Jin. Novel DPSK Demodulation System and Its Performance[J]. Acta Optica Sinica, 2023, 43(5): 0506006
- Acta Optica Sinica
- Vol. 43, Issue 5, 0506006 (2023)
Fig. 1. Structure diagram of DPSK modulation and demodulation system
Fig. 2. Simulation structure diagram of DPSK modulation and demodulation system
Fig. 3. Demodulation results of DPSK modulation and demodulation system. (a) m sequence; (b) differential encoding; (c) DPSK modulation; (d) signal of destructive interference port; (e) signal of constructive interference port; (f) demodulation result
Fig. 4. Influence of mismatching of arm length difference and code rate on Q value of system
Fig. 5. Influence of temperature on Q value of system
Fig. 6. Influence of narrow linewidth light source on Q value of traditional interference structure
Fig. 7. Influence of narrow linewidth light source on novel Mach-Zehnder interference structure
Fig. 8. Influence of wide linewidth light source on Q value of novel interference structure
Fig. 9. m sequence and demodulation results
Fig. 10. Influence of temperature on Q value of system
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Table 1. Q value and bit error rate of system at different temperatures
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