布里渊散射
光子学
激光线宽
计算机科学
信号(编程语言)
电子工程
光学
航程(航空)
物理
激光器
材料科学
工程类
程序设计语言
复合材料
作者
Jiaqi Li,Qihang Zhou,Xiangzhen Yu,Ke Du,Ke Song
摘要
In modern complex battlefield environment, it is important to obtain the frequency spectrum precisely. We propose an operational method of instantaneous frequency measurement (IFM) assisted by photonics, which can achieve high precision based on stimulated Brillouin scattering (SBS), giving the credit to the narrow linewidth of gain spectrum of SBS. By setting the scanning frequency, the amplitude comparison function (ACF) can be formed in the narrow lineband based on SBS effect. And the measurement of full frequency band is realized through a reference signal, the measured frequency range is limited only by photoelectric device. Estimation of multiple RFs can also be achieved with a resolution of 250MHz. In the numerical simulation, the average measurement error less than 1MHz is achieved in this scheme.
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