Parameter Self-Adjusting Nutation Fiber Coupling Algorithm Based on Fuzzy Control

Table 1. Fuzzy rules
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Table 1. Fuzzy rules
Control parameter $P_{t}$ $P$
$S$ $M$ $L$
$r$ $S$ $X L$ $M$ $V S$
$L$ $L$ $M$ $S$
$d$ $S$ $X L$ $M$ $V S$
$L$ $L$ $M$ $S$

Table 2. Coupling system parameter setting
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Table 2. Coupling system parameter setting
Parameter type Value
Light wavelength λ /nm 1550
Coupled lens focal length ƒ /mm 710
Optical fiber mode field radius ω₀ /μm 5.2
Coupling lens diameter D /cm 0.15

Table 3. Comparison of coupling performance without disturbance

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Table 3. Comparison of coupling performance without disturbance

Combined parameter selection /μm	Coupling efficiency η	Standard deviation σ	Number of iteration
$r = 0.25, d = 0.60$	0.681	0.0043	89
$r = 0.20, d = 0.50$	0.683	0.0020	105
$r = 0.15, d = 0.40$	0.685	0.0019	130
Proposed	0.687	0.0001	81

Table 4. 8 sets of controller parameters with good coupling effect
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Table 4. 8 sets of controller parameters with good coupling effect
Parameter group Controller parameter /μm
4 d=0.80，r=0.50
5 d=1.00，r=0.50
6 d=1.20，r=0.60
7 d=1.40，r=0.60
8 d=1.60，r=0.70
9 d=1.80，r=0.70
10 d=2.00，r=0.80
11 d=2.20，r=0.80

Table 5. Inhibition effect under different disturbances

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Table 5. Inhibition effect under different disturbances

Controller	Parameter	Self-adjusting	4	5	6	7	8	9	10	11
1‒5 Hz	$η$	0.796	0.794	0.790	0.783	0.777	0.768	0.759	0.750	0.738
1‒5 Hz	$σ$	0.015	0.017	0.022	0.028	0.034	0.040	0.051	0.055	0.068
5‒15 Hz	$η$	0.729	0.496	0.591	0.648	0.699	0.718	0.721	0.715	0.704
5‒15 Hz	$σ$	0.080	0.193	0.150	0.124	0.094	0.085	0.085	0.091	0.101
15‒20 Hz	$η$	0.628	0.270	0.305	0.341	0.397	0.469	0.519	0.572	0.628
15‒20 Hz	$σ$	0.161	0.265	0.280	0.255	0.246	0.218	0.200	0.173	0.162
Bandwidth /Hz		20	9	11	13	15	16	18	19	20

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Feng Guo, Shijie Gao, Yongkai Liu, Hao Wu, Lü Furui. Parameter Self-Adjusting Nutation Fiber Coupling Algorithm Based on Fuzzy Control[J]. Laser & Optoelectronics Progress, 2024, 61(17): 1706009

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