首页|Stability-enhanced RF signal transmission over long fiber-optic links
Stability-enhanced RF signal transmission over long fiber-optic links
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We propose a method for optimizing the phase stability of microwave signal transmission over long distances.First,the design of the photon link was modified to reduce the radio frequency[RF]signal's baseline noise and increase power.Second,a low-noise driver circuit was developed for a two-section distributed feedback[DFB]laser designed using reconstruction equivalent chirp[REC]technology to create an ultra-stable laser,and its performance was characterized through linewidth data.Test results indicate that the DFB laser achieved narrower linewidth,improving system phase sta-bility.When an injection current[30 mA]is applied to the reflection section of the two-section DFB laser,the laser linewidth will be narrower[1.38 MHz],further enhancing the system's phase transmission stability.At a 1 Hz offset frequency;a residual phase noise of-88.65 dBc/Hz is obtained.The short-term stability with an averaging time of 1 s is 1.60 × 10-14,and the long-term stability over a testing time of 60,000 s is 3.41 × 10-18.Even after incorporating temperature variations,the long-term stability reaches 8.37 × 10-18 at 22 h.
frequency disseminationtwo-section distributed feedback laserphase stability
尹知谦、郑满航、张川博、管世健、周昕、刘奕彤、刚泽宇、聂佳强、张云山、朱兴邦、方涛、陈向飞
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Engineering Research Center of Precision Photonics Integration and System Application,Ministry of Education & Key Laboratory of Intelligent Optical Sensing and Manipulation,Ministry of Education & National Laboratory of Solid State Microstructures & College of Engineering and Applied Sciences &Institute of Optical Communication Engineering & Nanjing University-Tongding Joint Lab for Large-scale Photonic Integrated Circuits,Nanjing University,Nanjing 210023,China
College of Electronics and Optical Engineering and College of Flexible Electronics[Future Technology],Nanjing University of Posts and Telecommunications,Nanjing 210023,China
The 41st Research Institute of China Electronics Technology Group Corp,Qingdao 266000,China
National Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of China
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