Performance of Coherent Beam Combining System with Multiple Aperture Receiver

Chenzhe Lao; Jianfeng Sun; Yu Zhou; Zhiyong Lu; Jiawei Li

doi:10.3788/CJL201946.0705003

Chinese Journal of Lasers, Volume. 46, Issue 7, 0705003(2019)

Performance of Coherent Beam Combining System with Multiple Aperture Receiver

Chenzhe Lao^1,2, Jianfeng Sun^1、*, Yu Zhou¹, Zhiyong Lu¹, and Jiawei Li¹

¹ Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

² Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

show less

Abstract Get PDF(in Chinese)

Figures & Tables(9)

Fig. 1. Principle diagram of laser coherent communication system based on multi-aperture receiving

Download full size

Fig. 2. Phase-locking accuracy of 1st stage coherent beam combining. (a) Phase RMSE as a function of disturbance frequency under different disturbance amplitudes; (b) ratio of phase RMSE to disturbance AMP as a function of disturbance frequency under different disturbance amplitudes

Download full size

Fig. 3. Phase-locking accuracy of 2nd stage coherent beam combining. (a) Phase RMSE as a function of disturbance frequency under different disturbance amplitudes; (b) ratio of phase RMSE to disturbance AMP as a function of disturbance frequency under different disturbance amplitudes

Download full size

Fig. 4. Diagram of beam combining performance test based on rotating phase screen

Download full size

Fig. 5. Relationship between residual MSE of phase compensation and closed-loop bandwidth

Download full size

Fig. 6. Variations in system sensitivity and bit error rate with turbulence compensation effect under different aperture numbers. (a) System sensitivity as a function of closed-loop bandwidth; (b) system bit error rate as a function of closed-loop bandwidth

Download full size

Table 1. Detail parameters of main components in beam combining system

View table

Table 1. Detail parameters of main components in beam combining system

Item	Description
3 dB coupler	Polarizationmaintaining;coupling ratio: 50/50
Phase shifter	Total phase shift:75π;insertion loss: <0.5 dB
DSP	CPU:TMS320C28346;clock speed: 300 MHzADC:AD7606;DAC: AD5344
APD	THORLABS APD430C;bandwidth: DC-400 MHz
Actuator driver	MPD-001;gain: 30

Table 2. Relative variance of light intensity fluctuation in fiber before and after beam combination at different Greenwood frequencies

View table

Table 2. Relative variance of light intensity fluctuation in fiber before and after beam combination at different Greenwood frequencies

Wind speed /(m·s^-1)	f_G /Hz	$\begin{matrix} σ_{1}^{2} \end{matrix}$	$\begin{matrix} σ_{2}^{2} \end{matrix}$	$\begin{matrix} σ_{3}^{2} \end{matrix}$	$\begin{matrix} σ_{4}^{2} \end{matrix}$	$\begin{matrix} σ_{I}^{2} \end{matrix}$
0.88	12.5	0.0163	0.0136	0.0286	0.0119	0.0065
1.32	18.8	0.0160	0.0136	0.0291	0.0119	0.0065
1.76	25.0	0.0164	0.0138	0.0295	0.0120	0.0086
2.20	31.3	0.0168	0.0137	0.0282	0.0122	0.0110
2.64	37.5	0.0167	0.0136	0.0289	0.0120	0.0130

Table 3. Simulation parameters
View table
Table 3. Simulation parameters
Parameter Symbol Value
Laser wavelength /nm λ 1550
Altitude of the satellite /km h 150
Wind velocity /(m·s^-1) w 22
The zenith angle /(°) θ 80
Number of aperture N 2,4,8
Total average SNR /dB Z_avg 15.6

Tools

Get Citation

Copy Citation Text

Chenzhe Lao, Jianfeng Sun, Yu Zhou, Zhiyong Lu, Jiawei Li. Performance of Coherent Beam Combining System with Multiple Aperture Receiver[J]. Chinese Journal of Lasers, 2019, 46(7): 0705003

Download Citation

EndNote(RIS)BibTex Plain Text

Set citation alerts for article

Save article for my favorites