Center Wavelength Calibration of Fabry‒Perot Filter Based on Dual-Wavelength Intensity Modulation

Parameter	Value
Wavelength range /Å	5000‒7000
Fineness	43.28@6330 Å
Coating reflectivity /%	93
Coating absorptivity /%	0.3
Cavity length / $μ m$	1000
Scan range / $μ m$	2 （electronic control）
Controller	CS100
Controller resolution /bit	12

Table 2. Mean $h_{s t e p}$ , $h_{s t e p}$ error, and $Δ$ n error
View table
Table 2. Mean $h_{s t e p}$ , $h_{s t e p}$ error, and $Δ$ n error
Parameter Value
Mean $h_{s t e p}$ of 6329.92 Å /pm 429.88
Mean $h_{s t e p}$ of 6578.22 Å /pm 429.73
Mean $h_{s t e p}$ of dual-wavelength /pm 429.80
$h_{s t e p}$ error /pm 0.05
$Δ$ n error /step 0.1

Table 3. Relationship between cavity length of F-P filter and controller value
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Table 3. Relationship between cavity length of F-P filter and controller value
Peak n $h$ / $μ m$
$P_{1}$ -812.908 1001.50220
$P_{2}$ -475.546 1001.64712
$P_{1}^{'}$ -76.633 1001.82168
$P_{2}^{'}$ 289.871 1001.97914

Table 4. Electronic component errors of F-P filter and resulting intensity errors
View table
Table 4. Electronic component errors of F-P filter and resulting intensity errors
Parameter Electronic component error $h_{s t e p}$ error /pm Standard deviation /%
Electrical noise $\pm$ 90 pm $\pm$ 90 $\pm$ 0.37
Quantization error $\pm 0.5 κ_{l s b}$ $\pm$ 244.2 $\pm$ 1.01
Non-linearity error $\pm 0.05 %$ $\pm$ 0.2442 $\pm$ 0.001

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Jin Zhu, Lin Ma, Zhengyu Jin, Hengyu Mu. Center Wavelength Calibration of Fabry‒Perot Filter Based on Dual-Wavelength Intensity Modulation[J]. Acta Optica Sinica, 2024, 44(24): 2428002

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