CAJ | 학술논문

1/4波片是全光纤电流传感器（AFOCT）最重要的光学器件之一,针对SLD宽谱光源产生的时间相干性问题,借助琼斯矩阵对光束的传播全过程进行了详细分析与计算,推导出探测器关于1/4波片参数的光强表达式。根据闭环电路工作原理得到了1/4波片参数对传感器信噪比和标度因数的影响规律,并通过实验验证。根据传感光纤的Verdet（维尔德）常数的温度特性,提出了1/4波片的优化设计。
1/4파편시전광섬전류전감기（AFOCT）최중요적광학기건지일,침대SLD관보광원산생적시간상간성문제,차조경사구진대광속적전파전과정진행료상세분석여계산,추도출탐측기관우1/4파편삼수적광강표체식。근거폐배전로공작원리득도료1/4파편삼수대전감기신조비화표도인수적영향규률,병통과실험험증。근거전감광섬적Verdet（유이덕）상수적온도특성,제출료1/4파편적우화설계。
The quarter-waveplate is one of the most important optical devices in all fiber optical current transducer（AFOCT）.Taking into account the temporal coherence of SLD,the detailed analysis and calculation of the entire spreading process of the beam are completed by using Jones Matrix.The expression of optical intensity depending on the parameters of the quarter-waveplate can be set up.According to the principle of closed-loop circuit,the law about quarter-waveplate affecting the signal-to-noise ratio（SNR） and scale factor of AFOCT is disclosed and verified by experiments.Optimum design of the quarter-waveplate which is based on the temperature characteristic of the Verdet constant is also shown.