双折射
光学
极化(电化学)
微波食品加热
正交偏振光谱成像
信号(编程语言)
振幅
物理
保偏光纤
光纤
材料科学
光纤传感器
计算机科学
化学
物理化学
激光器
量子力学
程序设计语言
作者
Wei Zhu,Jing Li,Pei Li,Tigang Ning,Z. Jiao,Jianshuai Wang
出处
期刊:Applied Optics
[The Optical Society]
日期:2022-07-05
卷期号:61 (20): 5894-5894
被引量:2
摘要
Instantaneous frequency measurement (IFM) with single branch detection based on the birefringence effect is proposed and experimentally demonstrated. The unknown microwave frequencies are modulated to pump a length of polarization maintaining fiber. Due to the fiber birefringence effect, the input light signal is decomposed into two orthogonal-polarization signals with a relative time delay. After detection, an amplitude comparison function (ACF) is obtained by comparing the alternating-current and direct-current powers. Therefore, no multipath detection is needed so that the electrical variations in the photonic link can be cancelled out in ACF. A theoretical analysis is given to illustrate the mechanism of the proposed IFM system. The disturbances are investigated and discussed in simulation. A proof-of-concept experiment is carried out for verification with a result of ±0.2GHz over 2.2-5.2 GHz.
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