發(fā)布時間：2018-06-01 08:18

  本文選題：光纖 + 群折射率�。� 參考：《發(fā)光學(xué)報》2017年03期

【摘要】：粒子在基態(tài)和亞穩(wěn)態(tài)之間的振蕩會導(dǎo)致探測光吸收的降低,而探測光束在很窄的頻率范圍內(nèi)吸收的降低,會使介質(zhì)的感生折射率在同樣范圍內(nèi)迅速變化,從而改變?nèi)赫凵渎蕁g=n(ω)+ωdn/dω。本文利用光纖慢光理論,對不同條件下的群折射率限定和群速度的變化特性展開討論。群折射率隨光纖長度的增加而降低,不同離子濃度的摻鉺光纖中慢光的感生群折射率均隨調(diào)制頻率的增加而降低,同時在不同的調(diào)制頻率條件下,群折射率隨入射信號光強度的增大均有一個飽和的過程。
[Abstract]:The oscillation of particles between ground state and metastable state will lead to the decrease of the absorption of probe light, while the decrease of absorption of probe beam in a narrow frequency range will cause the induced refractive index of the medium to change rapidly in the same range, thus changing the group refractive index ngn (蠅) 蠅 dn/d 蠅. In this paper, the limiting of group refractive index and the variation of group velocity under different conditions are discussed by using the theory of optical fiber slow light. The group refractive index decreases with the increase of fiber length, and the induced group refractive index of slow light in erbium doped fiber with different ion concentration decreases with the increase of modulation frequency. The group refractive index has a saturation process with the increase of the intensity of the incident signal.
【作者單位】： 遼寧大學(xué)物理學(xué)院;中國科學(xué)院低溫工程學(xué)重點實驗室(理化技術(shù)研究所);
【基金】：國家自然科學(xué)基金(51627809) 中國科學(xué)院國際大科學(xué)計劃培訓(xùn)專項(1A1111KYSB20160017);中國科學(xué)院低溫工程學(xué)重點實驗室開放課題(CRYO201513)資助項目~~
【分類號】：TN253
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本文編號：1963507