Photonic generation of phase-coded linearly frequency modulation signals with increased TBWP

Weilei Gou, Lin Wang, Yu Yu, Xinliang Zhang
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Abstract

As a new pulse compression signal, the phase-coded linearly frequency modulated (LFM) signal is proposed to faciliate multi-purpose radars. Here, we propose and demonstrate a phase-coded LFM signal generator, whose center frequency and bandwidth can be both adjusted. The phase-coded LFM signal generator is realized by feeding a phase-modulated optical signal into an optoelectronic oscillator (OEO). When the Fourier domain mode-locking is achieved, a phasecoded LFM signal is successfully generated. The center frequency and bandwidth of the generated microwave signal can be adjusted by changing the wavelength of the tunable laser source (TLS) and the peak-to-peak voltage of the driving signal, respectively. Experiment results show that a phase-coded LFM microwave signal with a center frequency of 9.5 GHz and a bandwidth of 5 GHz is successfully generated, whose TBWP is 5.6×105. To demonstrate the flexibility of the proposed scheme, the center frequency and bandwidth of the generated phase-coded LFM signal are adjusted to 12.4 and 2.6 GHz, respectively. The signal generator can be used in pulse compression radar in the future.
增加TBWP的相位编码线性调频信号的光子产生
为了方便多用途雷达,提出了一种新的脉冲压缩信号——相位编码线性调频(LFM)信号。本文提出并演示了一种相位编码LFM信号发生器,其中心频率和带宽均可调节。相位编码LFM信号发生器是通过将相位调制的光信号送入光电振荡器(OEO)来实现的。当实现傅里叶域锁模后,成功地产生了一个相位编码的LFM信号。通过改变可调谐激光源(TLS)的波长和驱动信号的峰间电压,可以调节微波信号的中心频率和带宽。实验结果表明,成功地产生了一个中心频率为9.5 GHz、带宽为5 GHz的相位编码LFM微波信号,其TBWP为5.6×105。为了证明该方案的灵活性,将生成的相位编码LFM信号的中心频率和带宽分别调整为12.4 GHz和2.6 GHz。该信号发生器可用于脉冲压缩雷达。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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