Dual-comb source with a reconfigurable repetition frequency difference using intracavity Brillouin lasers  

作　　者：YANG SHI YUE-DE YANG TING WANG HANG-DONG WEI JIN-LONG XIAO YOU-LING CHEN YONG-ZHEN HUANG 

机构地区：[1]Key Laboratory of Optoelectronic Materials and Devices,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China [2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Photonics Research》2024年第10期2401-2408,共8页光子学研究（英文版）

基　　金：National Key Research and Development Program of China(2021YFB2800600);National Natural Science Foundation of China(61935018)。

摘　　要：A Brillouin-assisted 80-GHz-spaced dual-comb source with a reconfigurable repetition frequency difference ranging from 48 MHz to 1.486 GHz is demonstrated.Two pairs of dual-pump seeds with an interval offset produce the corresponding dual Brillouin lasers in two fiber loops,and then the Brillouin lasers give rise to dual combs via the cavity-enhanced cascaded four-wave mixing effect.The repetition frequency difference is determined by the interval offset of the dual-pump seeds,which is induced by the Brillouin frequency shift difference between different fibers in a frequency shifter.Each comb provides 22 lasing lines,and the central 10 lines in a 20-dB power deviation feature high optical signal-to-noise ratios exceeding 50 dB.The linewidths of the dual-comb beating signals are less than 300 Hz,and the absolute linewidths of the comb lines are around 1.5 kHz.The dual-comb source enables substantial repetition frequency differences from 48 MHz to 1.486 GHz by changing the pluggable fibers in the frequency shifter.

关 键 词：RECONFIGURABLE PUMP REPETITION 

分 类 号：TN248[电子电信—物理电子学]