Tunable Photonic Radio-Frequency Filter With a Record High Out-of-Band Rejection
Tunable Photonic Radio-Frequency Filter With a Record High Out-of-Band Rejection
复制标题
具有创纪录高带外抑制的可调谐光子射频滤波器
DOI：
10.1109/tmtt.2017.2693148
复制
发表时间：
2016-11
影响因子：
4.3
通讯作者：
Pan Shilong
中科院分区：
文献类型：
--
作者：
Li Peixuan;Zou Xihua;Pan Wei;Yan Lianshan;Pan Shilong
由于射频（RF）滤波在电磁器件和系统中起着至关重要的作用，近年来人们对光子技术进行了深入研究，以实现射频滤波器，以利用宽频率覆盖、大瞬时带宽、低频率相关损耗、灵活的可调性和强电磁干扰的抗扰性。然而，光子射频滤波器（PRF）面临的一个关键挑战是不太令人印象深刻的带外抑制。在这里，据我们所知，我们通过结合高选择性极化控制和受激布里渊散射效应实现的大窄带放大，展示了具有高处理分辨率的可调谐PRF的80 dB的带外抑制记录。对于窄通带（例如，几兆赫）和PRF中的高精细度来说，这种记录抑制是很难实现的。此外，所提出的PRF是一种能够提供可忽略的插入损耗和甚至信号增益的有源PRF。还演示了2.1至6.1 GHz的可调谐中心频率。提出的PRF将为恶劣的电磁环境提供超高噪声或杂波抑制，特别是在需要室温实施和远程分布的情况下。
As radio-frequency (RF) filtering plays a vital role in electromagnetic devices and systems, recently photonic techniques have intensively been studied to implement RF filters to harness wide frequency coverage, large instantaneous bandwidth, low frequency-dependent loss, flexible tunability, and strong immunity to electromagnetic interference. However, one crucial challenge facing the photonic RF filter (PRF) is the less impressive out-of-band rejection. Here, to the best of our knowledge, we demonstrate a record out-of-band rejection of 80 dB for a tunable PRF with a high processing resolution, by incorporating the highly selective polarization control and the large narrowband amplification enabled by the stimulated Brillouin scattering effect. This record rejection is arduous to be achieved for a narrow passband (e.g., a few megahertz) and a high finesse in a PRF. Moreover, the proposed PRF is an active one capable of providing negligible insertion loss and even signal gain. A tunable central frequency ranging from 2.1 to 6.1 GHz is also demonstrated. The proposed PRF will provide an ultrahigh noise or clutter suppression for harsh electromagnetic scenarios, particularly when room-temperature implementation and remote distribution are needed.
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影响因子：
4.3
作者：
S. Fouladi;F. Huang;W. D. Yan;R. Mansour
通讯作者：
S. Fouladi;F. Huang;W. D. Yan;R. Mansour
影响因子：
8.6
作者：
Okawachi, Y;Bigelow, MS;Gaeta, AL
通讯作者：
Gaeta, AL
影响因子：
1.1
作者：
CULVERHOUSE, D;FARAHI, F;JACKSON, DA
通讯作者：
JACKSON, DA
影响因子：
3.8
作者：
A. Wise;M. Tur;A. Zadok
通讯作者：
A. Wise;M. Tur;A. Zadok
DOI：
10.1364/ofc.2014.th3d.6
发表时间：
2014-03
期刊：
OFC 2014
影响因子：
--
作者：
P. Matthews
通讯作者：
P. Matthews