利用游标效应的两非相干光频梳混频产生全波段毫米波白噪声

Generation of Full Band Millimeter-Wave White Noise Using Two Incoherent Optical Frequency Comb Mixing Base on Vernier Effect

提出了一种可在毫米波全波段产生超大带宽、平坦噪声的方法。利用两频率间隔不等的非相干光光频梳,基于游标效应,设计了主尺和副尺的频率间隔和非相干光线宽。仿真证明,利用所提方法可产生频率范围覆盖30~300 GHz的超大宽带、平坦的全波段毫米波白噪声。实验上通过可编程滤波器从放大自发辐射噪声中滤出两束频率间隔为游标式的梳状光,并在两个不同带宽的单行载流子光电探测器上分别实现了频率范围为130~170 GHz和280~380 GHz的毫米波白噪声,其平坦度分别低至±2.25 dB和±3.10 dB,验证了理论的正确性。

A method that can generate ultra-wide and flat noise in the whole millimeter-wave band is proposed.Based the vernier effect,the frequency intervals and incoherent light widths of the main ruler and the subordinate ruler are designed by using two incoherent optical frequency combs with different frequency intervals.Simulation results show that the proposed method can generate ultra-wide band and flat full-band millimeter-wave white noise with a frequency range of 30-300 GHz.Experimentally,the amplified spontaneous emission noise is filtered out of two comb-shaped lights with a vernier frequency interval through a programmable filter,and two millimeter-wave white noises are achieved based on unitraveling-carrier photodetector with two different band widths.The frequency ranges of the two white noises are 130-170 GHz and 280-380 GHz,and the corresponding flatness are±2.25 dB and±3.10 dB,which verifies the correctness of the proposed theory.