Li Peixuan, Pan Wei, Zou Xihua, Yan Lianshan, Pan Yan
Opt Lett. 2017 Aug 15;42(16):3129-3132. doi: 10.1364/OL.42.003129.
A photonic radiofrequency (RF) filter with two complementary bandpass and bandstop responses that is capable of simultaneously providing a single transmission channel at one port and a notch rejection channel at the other port is proposed. An integrated polarization division-multiplexing Mach-Zehnder modulator and the in-fiber stimulated Brillouin scattering effect are used to control the amplitudes and phases of the RF modulation sidebands along two orthogonal states of polarization to generate two complementary bandpass and bandstop responses at two output ports, respectively. Experiments are then performed. Two complementary responses are simultaneously generated in a high-frequency resolution of ∼20 MHz, with a rejection over 35 or 51 dB being achieved for the passband or stopband. A tunable central frequency to the bandpass and bandstop responses is also demonstrated within the range from 3 to 15 GHz.
提出了一种具有两个互补带通和带阻响应的光子射频（RF）滤波器，该滤波器能够在一个端口同时提供单个传输通道，在另一个端口提供陷波抑制通道。利用集成偏振分复用马赫-曾德尔调制器和光纤中的受激布里渊散射效应，沿着两个正交偏振态控制射频调制边带的幅度和相位，分别在两个输出端口生成两个互补的带通和带阻响应。然后进行了实验。以约20 MHz的高频分辨率同时生成两个互补响应，通带或阻带的抑制超过35或51 dB。还展示了在3至15 GHz范围内带通和带阻响应的可调中心频率。
