Li Ning, Huang Huan, Zhang Chongfu, Qiu Kun
Opt Lett. 2022 Jun 1;47(11):2662-2665. doi: 10.1364/OL.459201.
A microwave photonic channelization receiver is a promising technology for broadband radio frequency (RF) signal monitoring and reception. In this Letter, by exploiting acousto-optic frequency shifters (AOFSs), a microwave photonic channelization receiver is proposed. The proposed microwave photonic channelized receiver can reduce dual coherent optical frequency comb (OFC) generators with detuning frequency spacing into a single OFC generator. To verify the feasibility of the proposed channelization scheme, a broadband RF signal with 3.2 GHz bandwidth is channelized into eight narrowband RF signals with 0.4 GHz bandwidth. Moreover, we investigate the effect of the tuning error imposed by AOFSs, where the error vector magnitude (EVM) of subchannels is obtained by channelizing the four 16-quadrature amplitude modulation (16-QAM) signals into four subchannels.
微波光子信道化接收机是用于宽带射频（RF）信号监测和接收的一项很有前景的技术。在本信函中，通过利用声光频移器（AOFS），提出了一种微波光子信道化接收机。所提出的微波光子信道化接收机可以将具有失谐频率间隔的双相干光频梳（OFC）发生器简化为单个OFC发生器。为验证所提出的信道化方案的可行性，将一个带宽为3.2 GHz的宽带RF信号信道化为八个带宽为0.4 GHz的窄带RF信号。此外，我们研究了AOFS施加的调谐误差的影响，其中通过将四个16正交幅度调制（16-QAM）信号信道化为四个子信道来获得子信道的误差矢量幅度（EVM）。
