参量光频梳谱线线宽特征理论与实验研究  

Theoretical and experimental research on spectral linewidth charateristics of parametric optical frequency comb

作　　者：曹庭 闫娟娟[1] 陈静 梁爱虎 CAO Ting, YAN Juanjuan, CHEN Jing, LIANG Aihu(School of electronic and information engineering, Beihang University, Beijing 100083, Chin)

机构地区：[1]北京航空航天大学电子信息工程学院,北京100083

出　　处：《光通信技术》2018年第5期10-13,共4页Optical Communication Technology

基　　金：国家自然科学基金(61771029;61201155)资助

摘　　要：通过电光强度和相位调制激光器输出的连续波产生泵浦脉冲,利用单模光纤进行脉冲压缩整形后,激发高非线性光纤中的参量过程实现光谱拓展,产生参量光频梳(Optical Frequency Comb)。在此基础上研究参量光频梳谱线线宽的分布特征。通过分析电光调制后产生的初始光频梳的相位与载波激光和射频信号相位的关系,结合参量过程原理推导了新产生的谱线分量的相位与两条泵浦谱线相位间的关系,从而得出谱线线宽的分布特征。以线宽4.14MHz和64.8kHz的两种激光器为载波光源进行实验,分别产生了包含40条和60条谱线的参量光频梳,通过采用延时自外差法(DSHI)测量不同阶谱线的线宽,验证了理论分析结果的正确性。The pump pulses are shaped and compressed with a section of single mode fiber（SMF）.Parametric optical frequency combs are generated by using the electro-optical intensity and phase modulated continuous-wave laser to produce pump pulses and stimulate parametric process in a highly nonlinear fiber.Spectral linewidth distribution of the generated parametric comb lines are investigated.The relationship between the phase of initial comb lines produced by electro-optical modulation and those of the carrier laser and radio frequency（RF） signal is analyzed.According to the principle of parametric process,the relationship between the phase of the new generated and the seeding frequency lines is derived,and the of the linewidth distribution are obtained.In the experiments,combs with about 40 and 60 lines are obtained by using two carrier lasers with a linewidth of 4.14 MHz and 64.8 k Hz respectively.The linewidth of the tones with different orders is measured by the method of delayed self-heterodyne interferometer（DSHI）.The results also confirm the conclusion drawn from the theoretical analysis.

关 键 词：光学频率梳 电光调制 相位噪声 参量过程 线宽 

分 类 号：TN256[电子电信—物理电子学]