Liquid Crystal-Filled Double-D-Type PCF Dual-Parameter Sensor Based on SPR

Fig. 5. Temperature sensing characteristics. (a) Second-order polynomial fitting of wavelength sensitivity at range of 15-50 ℃; (b) linear fitting of wavelength sensitivity at range of 25-45 ℃; (c) amplitude sensitivity at range of 15-50 ℃

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Fig. 6. Relationship between core mode limiting loss and operating wavelength at different RI

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Fig. 7. Wavelength sensitivity and amplitude sensitivity within RI’s range of 1.48-1.55. (a) Wavelength sensitivity; (b) amplitude sensitivity

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Fig. 8. Influence of different d₀ on limiting loss

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Fig. 9. Influence of different d₂ on limiting loss

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Fig. 10. Influence of different d₁ on limiting loss

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Fig. 11. Sensitivity characteristics after parameter adjustment. (a) Second-order polynomial fitting of wavelength sensitivity within range of 15-50 ℃; (b) linear fitting of wavelength sensitivity within range of 25-45 ℃; (c) wavelength sensitivities within range of 1.48-1.55 of RI

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Table 1. Temperature loss values and resonance wavelength values
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Table 1. Temperature loss values and resonance wavelength values
Temperature /℃ 15 20 25 30 35 40 45 50
Loss peak /（dB·m^-1） 987.62 1222.70 1510.72 2049.16 2774.68 3963.81 5663.18 10865.95
Resonance wavelength /nm 1130 1150 1160 1190 1210 1250 1280 1370

Table 2. Various temperature sensing performance

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Table 2. Various temperature sensing performance

Temperature /℃	15-20	20-25	25-30	30-35	35-40	40-45	45-50
WS /（nm·℃^-1）	4	2	6	4	8	6	18
AS /（10^-2 RIU^-1）	6.67	6.43	9.87	9.52	11.29	10.82	22.57
R /（10^-2 RIU）	2.500	5.000	1.670	2.500	1.250	1.670	0.556
LOD /（10^-3 RIU²·nm^-1）	6.2500	25.0000	2.7800	6.2500	1.5600	2.7800	0.3090

Table 3. RI loss value and resonance wavelength value of each analyte
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Table 3. RI loss value and resonance wavelength value of each analyte
RI 1.48 1.49 1.50 1.51 1.52 1.53 1.54 1.55
Loss peak/（dB·m^-1） 1242.32 1364.72 1510.72 1691.69 1934.15 2258.10 2656.96 3099.03
RW /nm 1120 1140 1160 1190 1210 1240 1270 1300

Table 4. Various RI sensing performance

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Table 4. Various RI sensing performance

RI	1.48-1.49	1.49-1.50	1.50-1.51	1.51-1.52	1.52-1.53	1.53-1.54	1.54-1.55
WS /（nm·℃^-1）	2000	2000	3000	2000	3000	3000	3000
AS /RIU^-1	-22.85	-23.43	-23.85	-24.13	-24.54	-25.88	-27.91
R /（ $10^{- 5}$ RIU）	5.00	5000.00	3.33	5000.00	3.33	3.33	3.33
LOD /（ $10^{- 8}$ RIU²·nm^-1）	2.50	2.50	1.11	2.50	1.11	1.11	1.11

Table 5. Performance comparison of temperature and RI dual parameter sensors compared with previous studies

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Table 5. Performance comparison of temperature and RI dual parameter sensors compared with previous studies

Detection principle and structure	Temperature detection range /℃	WS of temperature /（nm/℃）	RI detection range	WS of RI /（nm/RIU）	Reference
SPR, double-D-type	0-40	1.06	1.33-1.34	1371	[1]
MZI, thin core cone-shape	20-150	0.03363	1.339-1.355	-135	[2]
MZI-TFBG, D type	20-50	5.15	1.3300-1.3614	521.92	[3]
SPR	15-35	2	1.3333-1.3860	3381	[4]
SPR, D type	15-50	3.2	1.47-1.55	2567	[5]
SPR, multicore	20-60	-2.59	1.34-1.37	1644	[6]
SPR	30-50	5	1.33-1.34	3900	[15]
SPR, double-D-type	15-50 25-45	13.79 (max) 7.6	1.48-1.55	2904.7	This work

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Zhenkai Fan, Junhao Meng, Shichao Chu. Liquid Crystal-Filled Double-D-Type PCF Dual-Parameter Sensor Based on SPR[J]. Acta Optica Sinica, 2024, 44(9): 0928001

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