介绍了一种高动态范围声光接收机,这种接收机具备实现宽带射频信号幅度,频率和相位的信道化探测能力。该接收机在0.6328μm激光器的工作条件下(1.0mW),声光布拉格盒在50mW射频信号驱动下,在140MHz的中心频率上,20MHz带宽内,对单频信号动态范围测量结果的超过55dB;当两个等幅、频率不同的射频信号同时加到布拉格元件上,其动态范围测量的结果超过50dB。频率分辨率可达到10kHz。

A high dynamic range acousto optic detector is demonstrated. The device have the capabilities for channelized detection of the amplitude, frequency, and phase of wideband rf signals and thus the capability to perform interferometric rf spectral analysis with significantly improved performances over the conventional AO Bragg cells. The device have provide dynamic range of 55 dB above tangential sensitivity, at the bandwidth of 20 MHz centered at 140 MHz at the optical wavelength of 0.6328 μm, the optical power of 1.0 mW, and the drive power of 50 mW/rf signal input. Two RF singnals of equal strengths and with frequencies f 1 and f 2 were applied simultaneously to the signal Bragg cell, the device dmonstrated dynamic range of 50 dB and frequency resilution of 10 kHz.