Chinese Journal of Lasers, Volume. 45, Issue 6, 0605004(2018)
Design and Development of Beam Transmitting System with Far-Field Beam Divergence Angle of Micro-Radian Dimension
Figures & Tables(10)
Fig. 3. (a) Projection of off-axis transmitted beam on the pupil; (b) far-field beam pattern simulated by CODE V
Fig. 4. Far-field divergence angle versus wave-front error influenced by different Zernike polynomials. (a) Z2-Z7; (b) Z8-Z11; (c) Z12-Z16
Fig. 5. Statistical distribution of far-field divergence angle of communication laser beam
Fig. 6. Probability of far-field divergence angle under 10 μrad versus wave-front error
Fig. 7. RMS wave-front errors of telescope under different temperatures. (a) 20.5 ℃; (b) 21.5 ℃; (c) 22.5 ℃
Fig. 8. Far-field divergence angle testing results of transmitted beam for integrated laser communication system under different temperatures. (a) 20.5 ℃; (b) 21.5 ℃; (c) 22.5 ℃
Table 1. Fringe Zernike polynomials
View tableTable 1. Fringe Zernike polynomials
Number Zernike polynomial Aberration type 1 1 Piston (constant) 2 ρ cosθ Distortion-tilt ( x -axis)3 ρ sinθ Distortion-tilt ( y -axis)4 2 ρ 2- 1Defocus-field curvature 5 ρ 2cos(2θ )Astigmatism, primary (axis at 0° or 90°) 6 ρ 2sin(2θ )Astigmatism, primary (axis at ±45°) 7 (3 ρ 3- 2ρ )cosθ Coma, primary ( x -axis)8 (3 ρ 3- 2ρ )sinθ Coma, primary ( y -axis)9 6 ρ 4- 6ρ 2+ 1Spherical aberration, primary 10 ρ 3cos(3θ )Trefoil, primary ( x -axis)11 ρ 3sin(3θ )Trefoil, primary ( y -axis)12 (4 ρ 4- 3ρ 2)cos(2θ )Astigmatism, secondary (axis at 0° or 90°) 13 (4 ρ 4- 3ρ 2)sin(2θ )Astigmatism, secondary (axis at ±45°) 14 (10 ρ 5- 12ρ 3+ 3ρ )cosθ Coma, secondary ( x -axis)15 (10 ρ 5- 12ρ 3+ 3ρ )sinθ Coma, secondary ( y -axis)16 20 ρ 6- 30ρ 4+ 12ρ 2- 1Spherical aberration, secondary
Table 2. Parameters of space laser communication system
View tableTable 2. Parameters of space laser communication system
R number / mm w /mmα a /mmλ /nmf /nm156 63.28 0.225 92.4 810 810
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Yaowu Kuang, Zhiping He, Liyin Yuan, Liang Zhang, Rong Shu. Design and Development of Beam Transmitting System with Far-Field Beam Divergence Angle of Micro-Radian Dimension[J]. Chinese Journal of Lasers, 2018, 45(6): 0605004
Paper Information
Category: beam transmission and control
Received: Dec. 8, 2017
Accepted: --
Published Online: Jul. 5, 2018
The Author Email: Shu Rong (shurong@mail.sit)
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