光通信网络系统信号调制方式的自动识别方法
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摘要
反向差分脉冲位置宽度的信号调制方法对于光通信网络系统的信号调制,未能获取连续光信号相位,降低光通信网络系统传输速率,提出一种光通信网络系统信号调制方式的自动识别方法。基于频率信号调制的先进信号调制格式采用各等级频率的载波完成信号传输,通过对自相关函数实施傅里叶变换获取FSK信号的功率谱密度,实现光通信网络系统信号格式信号调制;基于该信号格式采用光反转归零码-差分正交相移键控信号调制方法,将光反转归零码与差分正交相移键控相结合,通过MZ信号调制器完成信号幅度的信号调制,利用DQPSK信号调制器完成信号相位的信号调制,确保信号相位连续,保证了光通信网络系统的运行。实验结果表明,本文方法的光通信网络系统眼开度代价低于2 dB,该方法完成10个跨距的总传输用时仅为105ms,使得光通信网络系统速度提高约57. 6%,在有效完成光通信网络系统信号调制的同时,可降低眼开度代价、提高信号调制效率。
The modulation method based on reverse differential pulse position width for optical network communication failed to obtain the phase of continuous optical signal,which reduces the transmission rate of optical network communication,and put forward a new modulation method in high-speed optical network communication. The advanced modulation format based on frequency modulation uses the carrier frequency of each level to complete the signal transmission,and the power spectral density of FSK signal is obtained by implementing the self-correlation function to realize the optical network communication signal format modulation. Based on this signal format,the optical inversion zero code-difference orthogonal phase shift key-controlled modulation method is adopted,and the optical inversion zero code is combined with the differential orthogonal phase shift keying control. The modulation of the signal amplitude is completed by the MZ modulator,and the DQPSK modulator is used to complete the signal phase modulation. To guarantee the high-speed operation of optical network communication,the continuous phase of the signal is ensured.The experimental results show that the opening cost of high-speed optical network communication under the modulation of the proposed method is less than 2 dB,and the total transmission time for 10 spans is only 105 ms,which increases the optical network communication speed by approximately 57. 6%. This method can reduce the cost of opening cost and improve the modulation efficiency while effectively completing high-speed optical network communication modulation.
The modulation method based on reverse differential pulse position width for optical network communication failed to obtain the phase of continuous optical signal,which reduces the transmission rate of optical network communication,and put forward a new modulation method in high-speed optical network communication. The advanced modulation format based on frequency modulation uses the carrier frequency of each level to complete the signal transmission,and the power spectral density of FSK signal is obtained by implementing the self-correlation function to realize the optical network communication signal format modulation. Based on this signal format,the optical inversion zero code-difference orthogonal phase shift key-controlled modulation method is adopted,and the optical inversion zero code is combined with the differential orthogonal phase shift keying control. The modulation of the signal amplitude is completed by the MZ modulator,and the DQPSK modulator is used to complete the signal phase modulation. To guarantee the high-speed operation of optical network communication,the continuous phase of the signal is ensured.The experimental results show that the opening cost of high-speed optical network communication under the modulation of the proposed method is less than 2 dB,and the total transmission time for 10 spans is only 105 ms,which increases the optical network communication speed by approximately 57. 6%. This method can reduce the cost of opening cost and improve the modulation efficiency while effectively completing high-speed optical network communication modulation.
引文
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[3]刘宏展,廖仁波.无线光通信中的反向差分脉冲位置宽度信号调制方式[J].激光与光电子学进展,2015,52(7):63-70.
[4]李红艳,沈建华.适应超光通信系统的PM-MSK信号调制方案[J].光通信研究,2015,41(2):18-19.
[5]廖宇,冯国英,莫军,等.0.73~1.7μm超宽带微纳光纤波导全光信号调制器[J].光谱学与光谱分析,2017,37(11):3621-3625.
[6]于笑楠,佟首峰,姜会林,等.多点激光通信光学中继天线伺服系统[J].光学学报,2015,35(9):168-175.
[7]LI K W,WANG Z B,CHEN Y H,et al.High sensitive measurement of optical rotation based on photo-elastic modulation[J].Acta Physica Sinica,2015,64(18):40-43.
[8]张军,蔡文郁,温端强.水下激光通信系统及组网技术研究[J].电子技术应用,2017,43(9):53-56.
[9]张洋,刘海燕.新型电光逻辑门的设计及计算机图形光谱[J].红外与激光工程,2017,46(1):243-248.
[10]陈长庆,魏波.网络光纤通信中的噪声干扰去除方法研究[J].计算机仿真,2016,33(10):166-169.
[11]YING Z,WANG Z,ZHAO Z,et al.Comparison of microrings and microdisks for high-speed optical modulation in silicon photonics[J].Applied Physics Letters,2018,112(11):111108.
[12]谢崇进.数据中心光通信技术[J].电信科学,2016,32(5):44-51.
[13]刘艳,李阳,闫小军,等.随机折射率信号调制光纤光栅中的模式耦合分析[J].红外与毫米波学报,2016,35(1):72-77.
[14]尹雨,凌云,李浩,等.增益饱和反射型量子点半导体光放大器高通特性[J].光子学报,2018,47(1):13-20.
[15]LUKENS J M,ODELE O D,LEAIRD D E,et al.Electrooptic modulation for high-speed characterization of entangled photon pairs[J].Optics Letters,2015,40(22):5331-4.
[16]曾庆珠.基于网络融合的光通信技术研究[J].电视技术,2016,40(4):74-79.
[17]WANG H,ZHANG S,ZOU X,et al.Two-tone intensitymodulated optical stimulus for self-referencing microwave characterization of high-speed photodetectors[J].Optics Communications,2016,373(1):110-113.
[18]陈勇,李雷,刘焕淋.Hartley变换离散多音信号调制在可见光通信中的应用[J].半导体光电,2016,37(1):100-103.