Generation and Transmission Analysis of Flexible High-Order Quadrature Amplitude Modulation Vector Optical Signals

Linxian Zhao; Feng Zhao; Xiongwei Yang; Zhao Meng; Xiao Wang; Bingyao Tian; Zijian Ma

doi:10.3788/LOP220664

Laser & Optoelectronics Progress, Volume. 60, Issue 5, 0506003(2023)

Generation and Transmission Analysis of Flexible High-Order Quadrature Amplitude Modulation Vector Optical Signals

Linxian Zhao¹, Feng Zhao^2、*, Xiongwei Yang¹, Zhao Meng², Xiao Wang², Bingyao Tian², and Zijian Ma²

¹School of Communication and Information Engineering, Xi'an University of Posts and Telecommunications, Xi'an 710121, Shaanxi, China

²School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an 710121, Shaanxi, China

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Figures & Tables(11)

Fig. 1. Configuration diagram of flexible optical transmitter

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Fig. 2. Schematic diagram of circular 16QAM signal generation. (a) Combined output of DP-MZM1 and MZM; (b) individual modulation of DP-MZM2; (c) output of DP-MZM2

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Fig. 3. Schematic diagram of 4A4P-16QAM signal generation. (a) Combined output of DP-MZM1 and MZM; (b) individual modulation of DP-MZM2; (c) output of DP-MZM2

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Fig. 4. Schematic diagram of circular 32QAM signal generation. (a) Combined output of DP-MZM1 and MZM; (b) individual modulation of DP-MZM2; (c) output of DP-MZM2

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Fig. 5. Schematic diagram of 4A8P-32QAM signal generation. (a) Combined output of DP-MZM1 and MZM; (b) individual modulation of DP-MZM2; (c) output of DP-MZM2

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Fig. 6. Generation and transmission system of high-order QAM optical signal

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Fig. 7. BER curves and constellation diagram of Cir-16QAM signal under different transmission conditions (OSNR is 13 dB). (a) 10 Gbaud Cir-16QAM, after BTB; (b) 10 Gbaud Cir-16QAM, after 50 km SMF

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Fig. 8. BER curves and constellation diagram of 4A4P-16QAM signal under different transmission conditions (OSNR is 15 dB). (a) 5 Gbaud 4A4P-16QAM, after 10 km SMF; (b) 10 Gbaud 4A4P-16QAM, after 10 km SMF

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Fig. 9. BER curves and constellation diagram of Cir-32QAM signal under different transmission conditions (OSNR is 19 dB). (a) 10 Gbaud Cir-32QAM, after BTB; (b) 10 Gbaud Cir-32QAM, after 25 km SMF

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Fig. 10. BER curves and constellation diagram of 4A8P-32QAM signal under different transmission conditions (OSNR is 17 dB). (a) 5 Gbaud 4A8P-32QAM, after 40 km SMF; (b) 10 Gbaud 4A8P-32QAM, after 40 km SMF

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Table 1. Setting conditions for high-order QAM optical signals generation

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Table 1. Setting conditions for high-order QAM optical signals generation

		DP-MZM1			MZM	DP-MZM2
		$M Z M_{a 1}$	$M Z M_{b 1}$	$M Z M_{c 1}$	MZM	$M Z M_{a 2}$	$M Z M_{b 2}$	$M Z M_{c 2}$
Cir- 16QAM	Amplitude	$A_{1} = 2 V_{π}$	$A_{2} = 2 V_{π}$	N/A	$A_{3} = 0.25 V_{π}$ $A_{4} = 0$	$A_{5} = 0.8 V_{π}$	$A_{6} = 0.6 V_{π}$	N/A
Cir- 16QAM	Bias	0	0	$0.5 V_{π}$	0	$0.3 V_{π}$	$0.25 V_{π}$	$0.5 V_{π}$
4A4P- 16QAM	Amplitude	$A_{1} = 2 V_{π}$	$A_{2} = 2 V_{π}$	N/A	$A_{3} = 0$ $A_{4} = 0$	$A_{5} = 0.5 V_{π}$	$A_{6} = 0.4 V_{π}$	N/A
4A4P- 16QAM	Bias	0	0	$0.5 V_{π}$	0	0	0	0
Cir- 32QAM	Amplitude	$A_{1} = 2 V_{π}$	$A_{2} = 2 V_{π}$	N/A	$A_{3} = 0.25 V_{π}$ $A_{4} = 0.125 V_{π}$	$A_{5} = 0.8 V_{π}$	$A_{6} = 0.6 V_{π}$	N/A
Cir- 32QAM	Bias	0	0	$0.5 V_{π}$	0	$0.2 V_{π}$	$0.15 V_{π}$	$0.5 V_{π}$
4A8P- 32QAM	Amplitude	$A_{1} = 2 V_{π}$	$A_{2} = 2 V_{π}$	N/A	$A_{3} = 0.25 V_{π}$ $A_{4} = 0$	$A_{5} = 0.5 V_{π}$	$A_{6} = 0.4 V_{π}$	N/A
4A8P- 32QAM	Bias	0	0	$0.5 V_{π}$	0	0	0	0

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Linxian Zhao, Feng Zhao, Xiongwei Yang, Zhao Meng, Xiao Wang, Bingyao Tian, Zijian Ma. Generation and Transmission Analysis of Flexible High-Order Quadrature Amplitude Modulation Vector Optical Signals[J]. Laser & Optoelectronics Progress, 2023, 60(5): 0506003

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Paper Information

Category: Fiber Optics and Optical Communications

Received: Feb. 7, 2022

Accepted: Mar. 3, 2022

Published Online: Mar. 6, 2023

The Author Email: Feng Zhao (hfengzhao@xupt.edu.cn)

DOI:10.3788/LOP220664

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology