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Frequency comb generation in WGM microsphere based generators for telecommunication applications
Quantum Electronics ( IF 0.9 ) Pub Date : 2020-10-28 , DOI: 10.1070/qel17409
J. Braunfelds 1 , R. Murnieks 1 , T. Salgals 2 , I. Brice 3 , T. Sharashidze 1 , I. Lyashuk 2 , A. Ostrovskis 1 , S. Spolitis 1 , J. Alnis 3 , J. Porins 1 , V. Bobrovs 1
Affiliation  

We review the frequency comb generation process, main microresonator parameters such as free spectral range (FSR) and Q-factor, previously used optical frequency comb (OFC) generator parameters and resulting frequency combs, as well as the implementation of OFC for optical data transmission. An optical frequency comb is produced in a setup based on a tapered fibre and a SiO2 microsphere. The generated frequency comb has a frequency spacing of 2 nm or 257 GHz. During the fabrication of a tapered fibre from SMF28, use is made of the transmission signal to control the taper pulling process. The final measured tapered fibre transmission is ∼96%. A microsphere whispering gallery-mode resonator (WGMR), exhibiting a Q-factor of at least 2 107, is fabricated from an optical fibre with a thicker core than SSMF. Moreover, for future experiments, a frequency comb generator based on a free-space setup consisting of lenses, a prism, and a microsphere is developed, and the Q-factor dependence on different distances between the prism and the microsphere is investigated.



中文翻译:

用于电信应用的基于 WGM 微球的发生器中的频率梳生成

我们回顾了频率梳生成过程、主要微谐振器参数,例如自由光谱范围 (FSR) 和Q因子、以前使用的光学频率梳 (OFC) 发生器参数和生成的频率梳,以及用于光学数据传输的 OFC 的实现. 在基于锥形光纤和 SiO 2微球的装置中产生光频梳。生成的频率梳具有 2 nm 或 257 GHz 的频率间隔。在使用 SMF28 制造锥形光纤期间,使用传输信号来控制锥形拉制过程。最终测得的锥形光纤传输率为~96%。微球回音壁模式谐振器 (WGMR),其Q因子至少为 2 10 7, 由纤芯比 SSMF 更厚的光纤制成。此外,为了未来的实验,开发了一种基于由透镜、棱镜和微球组成的自由空间设置的频率梳发生器,并研究了Q因子对棱镜和微球之间不同距离的依赖性。

更新日期:2020-10-28
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