提出一种基于“四合一”多功能集成光芯片和微型保偏光子晶体光纤环的干涉式光纤陀螺。“四合一”多功能光芯片利用混合集成技术将超辐射发光二极管(Super-Luminescent Diode, SLD)光源、耦合器、薄膜铌酸锂调制器、探测器组合在一起。为了在获得高敏感效应的同时尽可能减小陀螺尺寸,采用60 μm/100 μm超细径保偏光子晶体光纤绕制干涉环,最终实现Φ30 mm高精度集成化光纤陀螺样机的研制。常温测试结果表明,陀螺随机游走系数0.012 (°)/h1/2,10 s平滑零偏稳定性0.23 (°)/h(1σ),标度因数非线性2.83×10-5(-100 (°)/s~+100 (°)/s)。-30~60℃温度范围内,陀螺10 s平滑零偏稳定性0.51 (°)/h(1σ)。与传统基于分立器件的光纤陀螺相比,所提出的集成化光纤陀螺同时具有小尺寸和高精度的优势,在新型战术武器、无人系统等领域应用具有独特优势。
Abstract
A novel interferometric fiber optic gyroscope (I-FOG) based on a “four-in-one” multifunctional integrated optical chip and micro polarization-maintaining photonic-crystal fiber (PM-PCF) coil is proposed. The “four-in-one” multifunctional integrated optical chip integrates super-luminescent diode light source, couplers, thin-film lithium niobate (TFLN) modulator and photodiode detector employing a hybrid integration technology. To obtain a high sensitivity effect and minimize the I-FOG as much as possible, a type of 60 μm/100 μm ultra-thin diameter PM-PCF is customized to wind the interference ring, and a high-accuracy integrated I-FOG prototype with the volume of Φ30 mm is achieved. It experimentally demonstrates a smooth bias stability of 0.23 (°)/h(1σ)at the integration time of 10 s, with an angle random walk (ARW) of 0.012 (°)/h1/2 and a scale factor nonlinearity of 2.83×10-5 over the range of ±100 (°)/s at room temperature. It also shows a smooth bias stability of 0.51 (°)/h (1σ) at the integration time of 10 s over the temperature range from -30~60 ℃. Compared with conventional I-FOG with discrete photo-electric devices, the I-FOG proposed has both small volume and high accuracy, which has unique advantages for application in the field of new-type tactical weapons, unmanned systems and other fields.
关键词
多功能集成光芯片 /
薄膜铌酸锂调制器 /
保偏光子晶体光纤
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Key words
multifunctional integrated optical chip /
thin-film lithium niobate modulator /
polarization-maintaining photonic-crystal fiber
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中图分类号：
V241.5
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