20 May 2009 Research and fabrication of integrated optical chip in FOG
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Fiber optic gyroscope is a completely static, pure optical gyroscope, with a high resolution and other advantages. In order to make the Fiber optic gyroscope be smaller in size, more reliable and sensitive, this paper presents a new type of interference integrated optical chip, which is X-cut and Y-propagation LiNbO3 substrate with the dimensions of 38mm×6mm× 2mm. We research and design Double-Y branching guide, phase modulator and polarizers of Integrated Optical Chip in FOG. Double-Y branching waveguide, phase modulator and polarizers were integrated in a chip, on which sensing element, resource (SLD), electrophotonic detector (PIN) and signal demodulation circuit are hybrid-Integrated together, then we get an acceleration FOG of high resolution. We test the chip with input light and find that diffraction image of output light from the double-Y branching waveguide is well symmetric, which indicates that the double-Y branching waveguide is 3dB beam-splitting, to overcome deficiencies of fiber coupler of splicing type and dual-melting conical. Exciting signal is coherent with the output signal of the FOG, and the performances of the FOG meets design requirement.
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De En, De En, Ke-xin Xu, Ke-xin Xu, Cai-he Chen, Cai-he Chen, Yu-ming Cui, Yu-ming Cui, Jin-wu Wang, Jin-wu Wang, Ya-bing Zhao, Ya-bing Zhao, Qin Si, Qin Si, } "Research and fabrication of integrated optical chip in FOG", Proc. SPIE 7283, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 72831G (20 May 2009); doi: 10.1117/12.828665; https://doi.org/10.1117/12.828665

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