Long-term ultrastable frequency dissemination via a 50-km spooled fiber link using a two-section DFB laser  

作　　者：尹知谦 张川博 管世健 周昕 王亚光 王磊磊 郑满航 刘奕彤 张云山 朱兴邦 方涛 陈向飞 Zhiqian Yin;Chuanbo Zhang;Shijian Guan;Xin Zhou;Yaguang Wang;Leilei Wang;Manhang Zheng;Yitong Liu;Yunshan Zhang;Xingbang Zhu;Tao Fang;Xiangfei Chen(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,Nanjing University of Posts and Telecommunications,Nanjing 210023,China;The 41st Research Institute of China Electronics Technology Group Corp,Qingdao 266000,China)

机构地区：[1]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 [2]College of Electronics and Optical Engineering and College of Flexible Electronics,Nanjing University of Posts and Telecommunications,Nanjing 210023,China [3]The 41st Research Institute of China Electronics Technology Group Corp,Qingdao 266000,China

出　　处：《Chinese Optics Letters》2024年第1期164-169,共6页中国光学快报（英文版）

基　　金：supported by the National Key R&D Program of China(No.2020YFB2205804);the National Natural Science Foundation of China(Nos.62273355,61975075,61975076,and 62004094);the Natural Science Foundation of Jiangsu Province of China(No.BK20200334);the Jiangsu Science and Technology Project(No.BE2017003-2)。

摘　　要：The stable long-distance transmission of radio-frequency(RF)signals holds significant importance from various aspects,including the comparison of optical frequency standards,remote monitoring and control,scientific research and experiments,and RF spectrum management.We demonstrate a scheme where an ultrastable frequency signal was transmitted over a 50 km coiled fiber.The optical RF signal is generated using a two-section distributed feedback(DFB)laser for direct modulation based on the reconstruction equivalent chirp(REC)technique.The 3-dB modulation bandwidth of the two-section DFB laser is 18 GHz and the residual phase noise of-122.87 dBc/Hz is achieved at 10-Hz offset frequency.We report a short-term stability of 1.62×10^(-14)at an average time of 1 s and a long-term stability of 6.55×10^(-18)at the measurement time of 62,000 s when applying current to the front section of the DFB laser.By applying power to both sections,the stability of the system improves to 4.42×10^(-18)within a testing period of 56,737 s.Despite applying temperature variations to the transmission link,long-term stability of 8.63×10^(-18)at 23.9 h can still be achieved.

关 键 词：frequency dissemination two-section DFB laser phase stability 

分 类 号：TN248[电子电信—物理电子学]