Tunable triangular frequency modulated microwave waveform generation with improved linearity using an optically injected semiconductor laser

Zhang Bowen; Zhu Dan; Zhou Pei; Xie Chenxu; Pan Shilong

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Tunable triangular frequency modulated microwave waveform generation with improved linearity using an optically injected semiconductor laser

机译：可调谐三角频频调制微波波形，使用光学注射的半导体激光器具有改进的线性度

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A photonic approach to generating a triangular frequency modulated microwave waveform with improved linearity using an optically injected semiconductor laser is proposed and demonstrated. By controlling the optical injection strength to the semiconductor laser at the period-one oscillation state to have a triangular shape, a triangular frequency modulated microwave waveform is generated after the optical-electrical conversion. A method based on a generalized regression neural network is proposed to improve the linearity of the generated waveform. By adjusting the parameters of the low-frequency electrical triangular control signal, the tunability of the center frequency, bandwidth, and time duration of the generated waveform can be realized. In the proof-of-concept experiment, a triangular frequency modulated microwave waveform with a frequency range from 14-24 GHz and a time duration of 2 mu s has been successfully generated. The improvement of the linearity of the waveform is experimentally verified. The performance of the generated triangular frequency modulated microwave waveforms for reducing the range-Doppler coupling is verified through the analyses of the ambiguity function. The tunability of the center frequency, bandwidth, and time duration is also experimentally demonstrated. (C) 2019 Optical Society of America

机译：提出了一种使用光学注入的半导体激光器产生具有改进的线性度的三角频率调制微波波形的光子方法。通过在一个振荡状态下控制到半导体激光器的光学喷射强度以具有三角形形状，在光电转换之后产生三角频率调制微波波形。提出了一种基于广义回归神经网络的方法来提高所产生波形的线性度。通过调整低频电三角控制信号的参数，可以实现所生成波形的中心频率，带宽和持续时间的可调性。在概念证明实验中，已经成功地生成了频率范围的三角频率调制微波波形和2μs的持续时间。实验验证了波形线性的改善。通过对模糊函数的分析验证了用于减小范围多普勒耦合的产生的三角形频率调制微波波形的性能。在实验上还证明了中心频率，带宽和持续时间的可调性。（c）2019年光学学会

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来源
《Applied optics》 |2019年第20期|共7页
作者
Zhang Bowen; Zhu Dan; Zhou Pei; Xie Chenxu; Pan Shilong;
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作者单位

Nanjing Univ Aeronaut &

Astronaut Key Lab Radar Imaging &

Microwave Photon Minist Educ Nanjing 210016 Jiangsu Peoples R China;

Nanjing Univ Aeronaut &

Astronaut Key Lab Radar Imaging &

Microwave Photon Minist Educ Nanjing 210016 Jiangsu Peoples R China;

Nanjing Univ Aeronaut &

Astronaut Key Lab Radar Imaging &

Microwave Photon Minist Educ Nanjing 210016 Jiangsu Peoples R China;

Nanjing Univ Aeronaut &

Astronaut Key Lab Radar Imaging &

Microwave Photon Minist Educ Nanjing 210016 Jiangsu Peoples R China;

Nanjing Univ Aeronaut &

Astronaut Key Lab Radar Imaging &

Microwave Photon Minist Educ Nanjing 210016 Jiangsu Peoples R China;

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正文语种 eng
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Tunable triangular frequency modulated microwave waveform generation with improved linearity using an optically injected semiconductor laser

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