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首页> 外文会议>Saint Petersburg International Conference on Integrated Navigation Systems; 20050523-25; Saint Petersburg(RU) >Digital Spectrometry Signal Treatment Applied to a Fiber-Optic Resonant Gyroscope for Rate Measurements
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Digital Spectrometry Signal Treatment Applied to a Fiber-Optic Resonant Gyroscope for Rate Measurements

机译：数字光谱信号处理应用于光纤共振陀螺仪进行速率测量

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摘要

The FORG operation principle uses a recirculating ring resonant cavity to get a rotation induced Sagnac effect enhancement. It grants to a FORG a comparable sensitivity in relation an I-FOG that has the fiber length S/2 times longer, where 5 is equal its finesse factor. Other advantage is despite of thermal drift because the FORG uses less quantity of fiber than the I-FOG, giving to the first less thermal drift than the last. But, due to the Kerr effect and coupler losses that causes parasitics effects like dissymmetry on signal response and cross polarization. Due to these facts, the FORG complexity is increased a lot. The signal response dissymmetries caused by Kerr effect can be corrected by phase nulling method, was proposed by Hotate. The proposal of this work is to show a technique applied to a FORG that simplifies the signal treatment, employing all digital setup, that results a maximally flat scale factor. In this investigation are presented simulations results, that employ the modified digital FM spectrometry techniques and decimation and interpolation techniques over a ring resonator that pursuit a 10 meters SM-PM length fiber coil and 10 centimeters of diameter core, with a 1.55 μm laser source. The advantages of these techniques are to simplify the electronic circuitry, offering an upgrade facility using only one DSP realizing all needed functions. The investigation of this method is based in an optical field switching scheme and digital frequency domain spectrometry too. The purpose of this work is to describe this digital technique, well as the simulations results, discussing about this technique use and its limitations.
机译：FORG操作原理使用循环环形共振腔来获得旋转引起的Sagnac效应增强。就光纤长度为S / 2倍的I-FOG（其中5等于其精细因子）而言，它可以使FORG具有可比的灵敏度。尽管存在热漂移，但另一个优势是，因为FORG使用的光纤量比I-FOG少，从而使第一个热漂移比最后一个少。但是，由于Kerr效应和耦合器损耗，导致了寄生效应，例如信号响应的不对称和交叉极化。由于这些事实，FORG的复杂性大大增加了。 Hotate提出，可以通过相位调零方法纠正由Kerr效应引起的信号响应不对称。这项工作的建议是展示一种应用于FORG的技术，该技术采用全数字设置简化了信号处理，从而产生了最大的平坦比例因子。在这项研究中，给出了仿真结果，这些仿真结果在环形谐振腔上采用改进的数字FM光谱技术以及抽取和插值技术，该环形谐振腔采用1.55μm激光源，追求10米SM-PM长度的光纤线圈和10厘米直径的纤芯。这些技术的优点是简化了电子电路，仅使用一个DSP即可实现所有所需功能，从而提供一种升级功能。该方法的研究也基于光场切换方案和数字频域光谱法。这项工作的目的是描述这种数字技术以及仿真结果，并讨论该技术的使用及其局限性。

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