论文标题
基于光子学的短时傅立叶变换无高频电子设备和设备
Photonics-based short-time Fourier transform without high-frequency electronic devices and equipment
论文作者
论文摘要
提出了基于光子学的短时傅立叶变换（STFT）系统，并基于刺激的布里鲁因散射（SB）实验证明，而无需使用高频电子设备和设备。通过使用低速周期性锯/三角驾驶电流，定期扫描分布式反馈激光二极管的波长。周期性频率扫描光学信号通过测试信号（SUT）调节，然后注入SBS培养基的一部分。当泵波反向注入SBS介质时，来自另一个激光二极管的光信号。简单地检测到低速光电探测器中的正向传输光学信号后，可以实现SUT的STFT。该系统的特征是没有任何高频电子设备或设备。进行实验。各种RF信号的STFT在4 GHz带宽中进行。动态频率分辨率证明约为60 MHz。
A photonics-based short-time Fourier transform (STFT) system is proposed and experimentally demonstrated based on stimulated Brillouin scattering (SBS) without using high-frequency electronic devices and equipment. The wavelength of a distributed feedback laser diode is periodically swept by using a low-speed periodic sawtooth/triangular driving current. The periodic frequency-sweep optical signal is modulated by the signal under test (SUT) and then injected into a section of SBS medium. The optical signal from another laser diode as the pump wave is reversely injected into the SBS medium. After simply detecting the forward transmission optical signals in a low-speed photodetector, the STFT of the SUT can be implemented. The system is characterized by the absence of any high-frequency electronic devices or equipment. An experiment is performed. The STFT of a variety of RF signals is carried out in a 4-GHz bandwidth. The dynamic frequency resolution is demonstrated to be around 60 MHz.
