Influence of the nonlinear propagation effect on the optical signal-to-noise ratio of 400G optical fiber communication systems

Huaqiang Qin; Xiaosheng Xiao

doi:doi:10.3788/COL201715.030604

Chinese Optics Letters, 2017, 15 (3): 030604, Published Online: Jul. 25, 2018

Influence of the nonlinear propagation effect on the optical signal-to-noise ratio of 400G optical fiber communication systems Download： 764次

Huaqiang Qin Xiaosheng Xiao ^*

Author Affiliations

State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing 100084, China

Figures & Tables

Fig. 1. Spectrum and constellation diagram of 400G with 25 Gsymbol/s. (a) dual-16QAM and (b) four-QPSK.

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Fig. 2. Setup of simulation. SSMF: standard single-mode fiber, OSA: optical spectrum analyzer.

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Fig. 3. Signal OSNR versus input power of the 100G single channel system and the three 400G single-channel systems, considering both ASE and NLI noises in uncompensated links with 5 fiber spans.

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Fig. 4. Signal OSNRs of the 100G system and the three 400G systems with different noises considered. (a) ASE noise only, (b) NLI noise only, and (c) both ASE and NLI noises. The total bit rates are 1.2 Tb/s for all four systems.

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Fig. 5. Signal OSNR of 400G systems with the ASE and NLI noises versus (a) the input channel power and (b) the average signal power in the fiber. The total bit rates are 2.4 Tb/s for all three systems.

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Fig. 6. Signal OSNRs versus the fiber span number of the 100G system and the three 400G systems with both ASE and NLI noises in uncompensated links. The input power of each system is optimized to get the maximum OSNR [as shown in Fig. 4(c)]. The total bit rates are 1.2 Tb/s for all four systems.

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Fig. 7. Signal OSNRs of the 100G system and the three 400G systems versus the subcarrier power. The total bit rates are 1.2 Tb/s for all four systems.

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Table1. Parameters of Modulation Formats

Bit Rate (Gb/s/ch)	100G	400G	400G	400G
Modulation format	QPSK	Dual-16QAM	Four-QPSK	Single-16QAM
Subcarrier number	1	2	4	1
Channel span (GHz)	50	75	150	75
Symbol rate (Gbaud)	25	25	25	50
Polarization number	2	2	2	2

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Table2. Fiber Parameters

Span length (km)	100
Nonlinear index coefficient	$2.6 \times 10^{- 20}$
Core area ( $m^{2}$ )	$80 \times 10^{- 10}$
Loss (dB/km)	0.2
D (ps/(nm·km))	17

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Huaqiang Qin, Xiaosheng Xiao. Influence of the nonlinear propagation effect on the optical signal-to-noise ratio of 400G optical fiber communication systems[J]. Chinese Optics Letters, 2017, 15(3): 030604.

Influence of the nonlinear propagation effect on the optical signal-to-noise ratio of 400G optical fiber communication systems Download： 764次

Fig. 1. Spectrum and constellation diagram of 400G with 25 Gsymbol/s. (a) dual-16QAM and (b) four-QPSK.

Fig. 2. Setup of simulation. SSMF: standard single-mode fiber, OSA: optical spectrum analyzer.

Fig. 3. Signal OSNR versus input power of the 100G single channel system and the three 400G single-channel systems, considering both ASE and NLI noises in uncompensated links with 5 fiber spans.

Fig. 4. Signal OSNRs of the 100G system and the three 400G systems with different noises considered. (a) ASE noise only, (b) NLI noise only, and (c) both ASE and NLI noises. The total bit rates are 1.2 Tb/s for all four systems.

Fig. 5. Signal OSNR of 400G systems with the ASE and NLI noises versus (a) the input channel power and (b) the average signal power in the fiber. The total bit rates are 2.4 Tb/s for all three systems.

Fig. 6. Signal OSNRs versus the fiber span number of the 100G system and the three 400G systems with both ASE and NLI noises in uncompensated links. The input power of each system is optimized to get the maximum OSNR [as shown in Fig. 4(c)]. The total bit rates are 1.2 Tb/s for all four systems.

Fig. 7. Signal OSNRs of the 100G system and the three 400G systems versus the subcarrier power. The total bit rates are 1.2 Tb/s for all four systems.

Table1. Parameters of Modulation Formats

Table2. Fiber Parameters

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Influence of the nonlinear propagation effect on the optical signal-to-noise ratio of 400G optical fiber communication systems Download： 764次

Fig. 1. Spectrum and constellation diagram of 400G with 25 Gsymbol/s. (a) dual-16QAM and (b) four-QPSK.

Fig. 2. Setup of simulation. SSMF: standard single-mode fiber, OSA: optical spectrum analyzer.

Fig. 3. Signal OSNR versus input power of the 100G single channel system and the three 400G single-channel systems, considering both ASE and NLI noises in uncompensated links with 5 fiber spans.

Fig. 4. Signal OSNRs of the 100G system and the three 400G systems with different noises considered. (a) ASE noise only, (b) NLI noise only, and (c) both ASE and NLI noises. The total bit rates are 1.2 Tb/s for all four systems.

Fig. 5. Signal OSNR of 400G systems with the ASE and NLI noises versus (a) the input channel power and (b) the average signal power in the fiber. The total bit rates are 2.4 Tb/s for all three systems.

Fig. 6. Signal OSNRs versus the fiber span number of the 100G system and the three 400G systems with both ASE and NLI noises in uncompensated links. The input power of each system is optimized to get the maximum OSNR [as shown in Fig. 4(c)]. The total bit rates are 1.2 Tb/s for all four systems.

Fig. 7. Signal OSNRs of the 100G system and the three 400G systems versus the subcarrier power. The total bit rates are 1.2 Tb/s for all four systems.

Table1. Parameters of Modulation Formats

Table2. Fiber Parameters

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