基于回音壁模式微球腔的PDH稳频技术（英文）
发布时间：2018-07-15 17:30
【摘要】：光学微球腔因其回音壁模式可获得极高的品质因数而受到广泛关注.本文分析了Fabry-Perot腔和微球腔的基本原理,通过CO2激光熔融光纤实验制得了直径为1.2mm的微球腔,并测试了微球腔和锥形光纤耦合结构的耦合特性.采用典型的PDH稳频系统设计了基于微球腔的稳频系统,分析了用于鉴频的误差曲线的吸收特性和色散特性,对比了不同调制频率、微球腔直径、耦合损耗、传输损耗下与误差曲线斜率的关系.结果表明:耦合状态下最大Q值可达到1.1×108,调节微球腔内横磁模和横电模的转换可优化耦合效率,匹配微球腔和锥形光纤的尺寸得到了径向二阶模式的透射谱,误差曲线效率达到15.4A mW/MHz.球腔在提高PDH稳频技术灵敏度上具有巨大潜力.
[Abstract]:The optical microsphere cavity has attracted much attention because of the high quality factor of its echo wall mode. The basic principle of Fabry-Perot cavity and microsphere cavity is analyzed in this paper. The microsphere cavity with diameter of 1.2mm is fabricated by CO2 laser melting fiber experiment, and the coupling characteristics of the coupling structure between the microsphere cavity and the tapered fiber are tested. The frequency stabilization system based on microsphere cavity is designed by using a typical PDH frequency stabilization system. The absorption and dispersion characteristics of the error curve used for frequency discrimination are analyzed, and the different modulation frequencies, the diameter of the microsphere cavity and the coupling loss are compared. The relationship between the transmission loss and the slope of the error curve. The results show that the maximum Q value can reach 1.1 脳 108 in the coupled state. The coupling efficiency can be optimized by adjusting the conversion between transverse magnetic mode and transverse electric mode in the microsphere cavity. The transmission spectrum of radial second-order mode is obtained by matching the size of microsphere cavity and tapered fiber. The efficiency of error curve is 15.4A MW / MHZ. The spherical cavity has great potential in improving the sensitivity of PDH technique.
【作者单位】： 中国科学技术大学精密机械与精密仪器系;
【基金】：The National Natural Science Foundation of China(No.61275011)
【分类号】：TN253
[Abstract]:The optical microsphere cavity has attracted much attention because of the high quality factor of its echo wall mode. The basic principle of Fabry-Perot cavity and microsphere cavity is analyzed in this paper. The microsphere cavity with diameter of 1.2mm is fabricated by CO2 laser melting fiber experiment, and the coupling characteristics of the coupling structure between the microsphere cavity and the tapered fiber are tested. The frequency stabilization system based on microsphere cavity is designed by using a typical PDH frequency stabilization system. The absorption and dispersion characteristics of the error curve used for frequency discrimination are analyzed, and the different modulation frequencies, the diameter of the microsphere cavity and the coupling loss are compared. The relationship between the transmission loss and the slope of the error curve. The results show that the maximum Q value can reach 1.1 脳 108 in the coupled state. The coupling efficiency can be optimized by adjusting the conversion between transverse magnetic mode and transverse electric mode in the microsphere cavity. The transmission spectrum of radial second-order mode is obtained by matching the size of microsphere cavity and tapered fiber. The efficiency of error curve is 15.4A MW / MHZ. The spherical cavity has great potential in improving the sensitivity of PDH technique.
【作者单位】： 中国科学技术大学精密机械与精密仪器系;
【基金】：The National Natural Science Foundation of China(No.61275011)
【分类号】：TN253
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