Research of DPSK Modulation and Self-Differential Homodyne Coherent Detection Technology to Overcome Atmospheric Turbulence Effect in the Satellite-to-Ground Laser Communication

Xiaoping, 马小平 Ma; Jianfeng, 孙剑锋 Sun; Yanan, 职亚楠 Zhi; Wei, 鲁伟 Lu; Liren, 刘立人 Liu; Qian, 许倩 Xu; Dong, 卢栋 Lu

doi:10.3788/aos201333.0706017

Cited by 8 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Furthermore, the optical fiber loss is the lowest to integrate with the ground optical fiber communication network simply when the working wavelength is 1550 nm [ 26 ]. Xiaoping Ma et al verified that the turbulence tolerance is widened and the detection efficiency of the deviation exceeds 95% when the communication rate reaches 2.5 Gbps and 10 Gbps [ 18 ]. Additionally, Gang Wu proposed that when the transmission rate is 40 Gbps, the signal will be distorted due to the fiber characteristics such as nonlinear effect, dispersion and polarization mode effect [ 27 ].…”

Section: Simulation Experiments Processmentioning

confidence: 99%

“…It brought a 3 dB gain to the demodulation input so that the sensitivity of the system was improved, and the transmission performance was optimized. Further, differently from existing methods, which implemented DPSK demodulation and optical signal phase difference detection separately using different technologies [ 16 , 17 , 18 ], this study combined the two. Specifically, we finished the identification by using the voltage signal from the differential output port of the balance detector after we had connected the demodulator and the balance detector.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Phase Alignment of an Array Optical Telescope System Using Balanced Detection

Wang

Huang

et al. 2023

Micromachines

View full text Add to dashboard Cite

Differential phase shift keying (DPSK) modulation and multi-aperture receiving are effective means for suppressing flickering, deviation, and fragmentation of the light spot by atmospheric turbulence. What is challenging in coherent beam combination of such an array receiver system is to detect and compensate for phase deviation of sub-apertures. In this paper, a method of phase alignment of an array optical telescope system using balanced detection was proposed and demonstrated. The improved Mach Zehnder Interferometer (MZI) can demodulate the digital signal and recover the phase difference at the same time. It also brings a 3 dB gain to the receiver and improves the detection sensitivity of the system. Adequate simulations with OptiSystem and MATLAB were carried out to show that the power value remains near the ideal state of 2.75 mW, and the bit error rate is less than 10−9 after phase compensation, which indicates the effectiveness and accuracy of the proposed method. Furthermore, taking the communication interruption difference of ninety degrees as an example, the system bit error rate was reduced from 1 to 10−35, and communication was established again.

show abstract

Section: Simulation Experiments Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Phase Alignment of an Array Optical Telescope System Using Balanced Detection

Wang

Huang

et al. 2023

Micromachines

View full text Add to dashboard Cite

show abstract

“…另外一种新型的、有效的方法是采用差分相移键控(DPSK) [37] 调制原理来调制和解调信号。这种加载信息到激光相位变化的调制方式，不需要波前补偿技术，不需要本振光，也不需要频率锁定 [38] 。该调制技术在地面光纤通信网络中已经得到成熟的应用。 DPSK 调制形式把要传递的信息加载在载波上相邻码元的相对相位变化中，称为相对调相，即对数字基带信号 a n (t) 进行差分编码，t 表示 t 时刻，把绝对码 a n (t) 换成相对码(或差分码) b n (t) ，编码规则为 b n (t) = a n (t)⊕b n -1 (t -1) ,…”

Section: -unclassified

Research Progress on Overcoming the Atmospheric Turbulence Effect in Satellite-to-Ground Laser Communication

Xiaoping¹,

Jianfeng²,

Peipei³

et al. 2014

激光与光电子学进展

Self Cite

View full text Add to dashboard Cite

The key problem in the satellite-to-ground laser communication is primarily to mitigate the effect of atmospheric turbulence. After propagating through the atmosphere with a long distance, the wave-front distortion of signal light brings about the degradation of bit error rate (BER). The experimental development of the satelliteto-ground laser communication based on the domestic and abroad research progress is described. Some effective methods and discusses to overcome the turbulence effect on the high rate communication are presented. Finally, coherent detection technology based on interference principle and differentical phase shift keying (DPSK) modulation is emphatically analyzed in the phase demodulation, and the advantages are summarized. It is predictable that this technology will become more practical and play an important role in its application areas.

show abstract