根据振幅调制的静磁波对导波光的磁光Bragg衍射调制作用,描述了空间积分磁光相关器的工作原理,得到了衍射光检测输出的带通信号包络以及归一化相关积分的解析表达式.分析了微波信号强度对空间积分磁光相关性能的影响,研究表明,在小信号范围内,相关输出的归一化包络的峰值较小,近似与驱动功率成正比,此时可实现严格的磁光相关,其处理增益可达20 dB.

According to magneto-optic (MO) Bragg diffraction and modulation effects in the interaction between the amplitude-modulated magnetostatic forward volume waves and guided optical waves,the operating principle of space-integrating MO correlators is described.The analytic expressions for the envelope of detected band-pass signal associated with normalized correlation integral are obtained and used to analyze the performance of the space-integrating MO correlators dependent on the intensity of microwave RF signals.It is shown that,in the range of small signals,the peak value of normalized envelope is approximately proportional to the RF-driven power and the MO correlation can be strictly realized with the processing gain of 20 dB or more.