Ultra-small interferometric fiber optic gyroscope with an integrated optical chip

Kejun Shang; Ming Lei; Haowei Li; Tianqi Zhang; Xiaozhi Yu; Qiang Xiang; Yonglin Na; Lizhe Zhang

doi:10.3788/COL202220.040601

Journals >Chinese Optics Letters >Volume 20 >Issue 4 >Page 040601 > Article

Chinese Optics Letters
Vol. 20, Issue 4, 040601 (2022)

Ultra-small interferometric fiber optic gyroscope with an integrated optical chip

Kejun Shang, Ming Lei^*, Haowei Li, Tianqi Zhang, Xiaozhi Yu, Qiang Xiang, Yonglin Na, and Lizhe Zhang

Author Affiliations

State Key Laboratory of Inertial Technology, Beijing Institute of Automatic Control Equipment, Beijing 100074, China

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DOI: 10.3788/COL202220.040601 Cite this Article Set citation alerts

Kejun Shang, Ming Lei, Haowei Li, Tianqi Zhang, Xiaozhi Yu, Qiang Xiang, Yonglin Na, Lizhe Zhang. Ultra-small interferometric fiber optic gyroscope with an integrated optical chip[J]. Chinese Optics Letters, 2022, 20(4): 040601 Copy Citation Text

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Fig. 1. Schematic configuration of the integrated IFOG.

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Fig. 2. “Three-in-one” integrated optical chip (a) schematic and (b) photograph.

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Fig. 3. Miniaturized optical fiber coil with coin for scale.

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Fig. 4. Miniaturized signal detection circuit (a) schematic and (b) photograph.

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Fig. 5. Miniaturized drive control circuit (a) flowchart and (b) photograph.

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Fig. 6. (a) Prototype, (b) test results, and (c) Allan variance analyses of the integrated IFOG.

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Function	Performance	Required Value
SLD	Output optical power	$> 300 μW$
	Central wavelength	$1310 \pm 20 nm$
	Spectral width	$> 30 nm$
	Power stability^a	$< 5 %$
	Wavelength shift	$< 100 ppm$
PD	Responsibility	$> 0.8 A / W$
	3 dB bandwidth	$> 20 MHz$
	Noise voltage	$< 1 mV$
	Dark current	$< 10 nA$
Coupler	Splitting ratio	<(50 ± 2):(50 ± 2)
Coupler	Insertion loss	$< 0.5 dB$

Table 1. Key Index of the IOC

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Gyro Type	Accuracy (deg/h)	Size (mm)
Integrated IFOG (closed loop)	Better than 0.1	$30 \times 30 \times 30$
Russian VG191 (open loop)	Better than 1	$ϕ 24 \times 48$
USA DSP1750 (open loop)	Better than 0.1	$ϕ 46 \times 23 (Header) / ϕ 58 \times 14 (Circuit)$