發(fā)布時(shí)間：2018-07-15 17:30

【摘要】：光學(xué)微球腔因其回音壁模式可獲得極高的品質(zhì)因數(shù)而受到廣泛關(guān)注.本文分析了Fabry-Perot腔和微球腔的基本原理,通過CO2激光熔融光纖實(shí)驗(yàn)制得了直徑為1.2mm的微球腔,并測試了微球腔和錐形光纖耦合結(jié)構(gòu)的耦合特性.采用典型的PDH穩(wěn)頻系統(tǒng)設(shè)計(jì)了基于微球腔的穩(wěn)頻系統(tǒng),分析了用于鑒頻的誤差曲線的吸收特性和色散特性,對(duì)比了不同調(diào)制頻率、微球腔直徑、耦合損耗、傳輸損耗下與誤差曲線斜率的關(guān)系.結(jié)果表明:耦合狀態(tài)下最大Q值可達(dá)到1.1×108,調(diào)節(jié)微球腔內(nèi)橫磁模和橫電模的轉(zhuǎn)換可優(yōu)化耦合效率,匹配微球腔和錐形光纖的尺寸得到了徑向二階模式的透射譜,誤差曲線效率達(dá)到15.4A mW/MHz.球腔在提高PDH穩(wěn)頻技術(shù)靈敏度上具有巨大潛力.
[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.
【作者單位】： 中國科學(xué)技術(shù)大學(xué)精密機(jī)械與精密儀器系;
【基金】：The National Natural Science Foundation of China(No.61275011)
【分類號(hào)】：TN253

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本文編號(hào)：2124833