热效应作用下SiO_(2)光学微腔中的多孤子光场分析  

Multi-Soliton Field Analysis in SiO_(2)Optical Microcavities with Thermal Effect

作　　者：徐昕 叶回春[2] 焦晨 金雪莹 潘成亮[1] 陈东[1] 夏豪杰[1] Xu Xin;Ye Huichun;Jiao Chen;Jin Xueying;Pan Chengliang;Chen Dong;Xia Haojie(Anhui Province Key Laboratory of Measuring Theory and Precision Instrument,School of Instrument Science and Optoelectronics Engineering,Hefei University of Technology,Hefei 230009,Anhui,China;Department of Precision Machinery and Precision Instrumentation,University of Science and Technology of China,Hefei 230027,Anhui,China)

机构地区：[1]合肥工业大学仪器科学与光电工程学院测量理论与精密仪器安徽省重点实验室,安徽合肥230009 [2]中国科学技术大学精密机械与精密仪器系,安徽合肥230027

出　　处：《光学学报》2024年第10期385-392,共8页Acta Optica Sinica

基　　金：国家自然科学基金(52175503)。

摘　　要：光学微腔中热效应对腔内光场的演化有重要的影响。在Lugiato-Lefever方程的基础上,分析了热效应对SiO_(2)光学微腔中光场演化的影响。研究发现,在零失谐的初始条件下,热效应可以在腔内激发出多孤子光场,但由于热效应的加剧,该光场只能短暂存在。因此,当多孤子光场产生后,利用调谐泵浦波长和功率的方式来保持微腔内的多孤子。通过选择合适的泵浦功率和波长扫描速度,可有效补偿热效应引起的失谐,维持多孤子光场。此外,泵浦的参数也会对调谐后的光场产生不同的影响。改变泵浦功率可以改变调谐后多孤子光场中脉冲的数量,泵浦功率越高,则热效应越明显,调谐后的多孤子光场包含的脉冲数量也越多。而泵浦波长的调谐速度过小,会导致多孤子光场逐渐消失;泵浦波长扫描过快,会引起微腔工作于正失谐状态,从而导致原有的多孤子演化为混沌光场。Objective Thermal effects in optical microcavities have an important influence on field evolution.Currently,the study on thermal effects in microcavities focuses on thermal oscillations.The thermal oscillations are caused by thermal expansion,thermo-optic effect,and Kerr effect,which lead to strong mode oscillations in microcavities.Self-stabilization of optical microcavities can be achieved by exploiting the resonance shift induced by the dynamic thermal effect.Through the thermo-optic(TO)effect,optical microcavities can be employed as temperature sensors with sensitivities up to 0.016%(RH)or higher.In addition,some studies on the thermal effect of microcavities focus on the influence of the optical field variation and thermal effect during the scanning process of the pump wavelength.However,there is a lack of discussion on the influence of thermal effects on the optical field in the microcavity,and existing studies fail to analyze how to maintain the solitons generated during the thermal effects.Therefore,in this paper,the effect of thermal response on the optical field in the enclosure is analyzed by taking the silica optical microcavity as an example,and a multi-soliton holding method is proposed.Methods In general,the variation of the optical field in the microcavity with time was described by the Lugiato-Lefever equation(LLE).On the basis of LLE,the thermal effect in the microcavity was taken into account,which consisted of the TO effect and the thermo-expansion(TE)effect.For the optical microcavity of SiO_(2) material discussed in this paper,since both the TO and TE effects were positive,and the coefficient of the TO effect was much larger than that of the TE effect,only the TO effect in the thermal effect was considered for the SiO_(2) optical microcavity.Generally speaking,during the microcavity operation,the thermal effect caused by the absorption of the optical field could change the resonant wavelength of the microcavity,which further led to the change of the detuning parameter.Therefore,the thermal e

关 键 词：激光器 光学微腔 热效应 多孤子 光场调谐 

分 类 号：O437[机械工程—光学工程]