Design and test of a laser lighting device for plant growth

Yanting Lan; Yifan Guo; Tian Wang; Xiaodong Chen; Qingquan Chu

doi:10.1364/AO.454631

Applied Optics
Vol. 61,
Issue 15,
pp. 4238-4245
(2022)
•https://doi.org/10.1364/AO.454631

Design and test of a laser lighting device for plant growth

Yanting Lan, Yifan Guo, Tian Wang, Xiaodong Chen, and Qingquan Chu

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Yanting Lan, Yifan Guo, Tian Wang, Xiaodong Chen, and Qingquan Chu, "Design and test of a laser lighting device for plant growth," Appl. Opt. 61, 4238-4245 (2022)

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Abstract

Aiming at the problems of high energy consumption, complex wiring, high layout cost, limited use environment, and limited function of conventional plant lighting equipment such as fluorescent lamps, sodium lamps, etc., this paper develops a type of laser device for plant growth with nanometer lasers based on the design of an intelligent control system of an immune algorithm, constant current driving circuit of the laser, pulse power supply, and rotatable intelligent platform to make the device more stable, reliable, practical, and energy efficient, and provides a useful reference for the innovation and application of materials, processes, and methods of plant lighting. The effects of nanometer laser light supplementation on the growth of purple lettuce, romaine lettuce, Chinese cabbage, and you-mai vegetable have been studied with the vegetables mentioned above as experimental materials and with natural light as the control sample. The results show that the nanometer laser device significantly increases stem height, stem thickness, leaf area, leaf number, and chlorophyll content, effectively promotes plant growth, and achieves efficient cultivation. In the future, studies of the effects of laser treatment on plant physiology and biochemistry will be sped up to explore the molecular biological mechanism of lasers to promote application and technological innovation of lasers in lighting for plant growth and the laser device in productivity.

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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Treatment	Stem Height/cm	Stem Thickness/cm	Leaf ${A r e a / c m}^{2}$	Leaf Number/Piece	Chlorophyll Content
RB7:2	$18.67 \pm 1 . 27 a$	$1.47 \pm 0 . 24 a b$	$6.57 \pm 1 . 80 b c$	$5.00 \pm 0 . 71 a$	$25.44 \pm 1 . 80 b c$
RB2:1	$19.23 \pm 1 . 27 a$	$1.42 \pm 0 . 36 a b$	$6.64 \pm 1 . 01 b c$	$5.20 \pm 0 . 84 a$	$29.83 \pm 1 . 89 a$
Control	$15.37 \pm 2 . 82 a$	$1.24 \pm 0 . 29 b$	$5.83 \pm 2 . 05 c$	$4.00 \pm 0 . 71 a$	$21.00 \pm 0 . 88 d$

Treatment	Stem Height/cm	Stem Thickness/cm	Leaf ${A r e a / c m}^{2}$	Leaf Number/Piece	Chlorophyll Content
RB7:2	$13.86 \pm 0 . 65 a b$	$1.33 \pm 0 . 23 a b c$	$7.49 \pm 1 . 19 a$	$6.40 \pm 0 . 55 a$	$29.02 \pm 0 . 97 b$
RB2:1	$14.87 \pm 0 . 80 a$	$1.34 \pm 0 . 24 a b c$	$3.71 \pm 0 . 26 c$	$6.42 \pm 0 . 55 a$	$29.37 \pm 1 . 86 b$
Control	$12.44 \pm 1 . 82 b$	$1.16 \pm 0 . 16 b$	$2.42 \pm 0.56 d$	$5.60 \pm 0 . 55 a$	$23.03 \pm 1 . 70 c$

Treatment	Stem Height/cm	Stem Thickness/cm	Leaf ${A r e a / c m}^{2}$	Leaf Number/Piece	Chlorophyll Content
RB7:2	$12.34 \pm 1 . 13 a$	$1.48 \pm 0 . 06 b c$	$7.08 \pm 1 . 09 a b$	$8.60 \pm 0 . 55 a$	$40.88 \pm 1 . 73 a$
RB2:1	$11.74 \pm 1 . 12 a b$	$1.59 \pm 0 . 27 a b$	$7.24 \pm 1 . 18 a$	$7.40 \pm 1 . 14 b c$	$43.40 \pm 3 . 82 a b$
Control	$10.32 \pm 0 . 95 b c$	$1.29 \pm 0 . 15 b c d$	$6.36 \pm 0 . 79 a b c$	$6.40 \pm 0.89 c d$	$36.00 \pm 1 . 28 a b$

Treatment	Stem Height/cm	Stem Thickness/cm	Leaf ${A r e a / c m}^{2}$	Leaf Number/Piece	Chlorophyll Content
RB7:2	$19.00 \pm 0 . 76 a$	$1.36 \pm 0 . 29 a b$	$11.67 \pm 2 . 51 a$	$6.00 \pm 0 . 71 a$	$28.97 \pm 0 . 67 b$
RB2:1	$16.98 \pm 1 . 38 b$	$1.37 \pm 0 . 40 a b$	$7.53 \pm 1 . 04 b$	$5.60 \pm 0 . 55 a b$	$31.47 \pm 0 . 83 a$
Control	$14.30 \pm 1 . 59 c$	$1.29 \pm 0 . 25 a b c$	$4.04 \pm 0.73 c d$	$5.00 \pm 0 . 71 b c$	$25.27 \pm 1 . 29 c$

Treatment	Stem Height/cm	Stem Thickness/cm	Leaf ${A r e a / c m}^{2}$	Leaf Number/Piece	Chlorophyll Content
RB7:2	$18.67 \pm 1 . 27 a$	$1.47 \pm 0 . 24 a b$	$6.57 \pm 1 . 80 b c$	$5.00 \pm 0 . 71 a$	$25.44 \pm 1 . 80 b c$
RB2:1	$19.23 \pm 1 . 27 a$	$1.42 \pm 0 . 36 a b$	$6.64 \pm 1 . 01 b c$	$5.20 \pm 0 . 84 a$	$29.83 \pm 1 . 89 a$
Control	$15.37 \pm 2 . 82 a$	$1.24 \pm 0 . 29 b$	$5.83 \pm 2 . 05 c$	$4.00 \pm 0 . 71 a$	$21.00 \pm 0 . 88 d$

Abstract

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Applied Optics