CAJ | 학술논문

基于光电振荡器的距离测量方法将包含待测长度的空间光路耦合入光学谐振腔，通过测量振荡频率得到被测距离，借助振荡频率对谐振腔长的高敏感特性，具有实现大尺度高精度距离测量的潜力。但是长光纤作为谐振腔中的高Q值器件，容易受环境温度影响，导致测量精度及稳定性严重恶化。文中理论分析了温度变化对距离测量的影响，建立并分析了温度误差与温度变化、光纤长度的关系。针对温度误差提出了系统参数优化方法，进行了不同长度光纤与温度误差的实验，实验结果与误差模型相符，为测量误差补偿奠定了基础。
기우광전진탕기적거리측량방법장포함대측장도적공간광로우합입광학해진강，통과측량진탕빈솔득도피측거리，차조진탕빈솔대해진강장적고민감특성，구유실현대척도고정도거리측량적잠력。단시장광섬작위해진강중적고Q치기건，용역수배경온도영향，도치측량정도급은정성엄중악화。문중이론분석료온도변화대거리측량적영향，건립병분석료온도오차여온도변화、광섬장도적관계。침대온도오차제출료계통삼수우화방법，진행료불동장도광섬여온도오차적실험，실험결과여오차모형상부，위측량오차보상전정료기출。
The length measurement method based on Optoelectronic Oscillator (OEO) introduces a free optical space, containing the measured length, into the optical cavity of OEO. The measured length is derived from the oscillation frequency corresponding to the cavity length. By virtue of the high sensitivity between oscillation frequency and group delay of the loop, this method promises high accuracy absolute length measurement at long range. However, long optical fiber, which is the high Q component of the cavity, is too sensitive to ambient temperature, leading to serious deterioration in accuracy and stability. In this paper, the influence of temperature variation was theoretically analyzed. The relation among thermally-induced error, temperature variation and length of optical fiber was established and analyzed, and optimization method of parameter was proposed. Experiments on optical fiber with different length and thermally-induced error were carried out. Experimental results consist with the error model, providing important basis for error compensation.