单调变化的渐变折射率波导的表面折射率大于波导基模的有效折射率,因而不能用传统的 m 线方法测量。利用分析转移矩阵(ATM)方法研究了渐变折射率波导中的表面等离子波,提出了一种确定波导近表面折射率的实验技术,在波导折射率分布的... 单调变化的渐变折射率波导的表面折射率大于波导基模的有效折射率,因而不能用传统的 m 线方法测量。利用分析转移矩阵(ATM)方法研究了渐变折射率波导中的表面等离子波,提出了一种确定波导近表面折射率的实验技术,在波导折射率分布的拟合中,得到了比传统逆WKB方法更为合理的结果。展开更多
TN252 96042519多层线型分割法分析渐变形平板介质波导=Analysing graded-index planar waveguidesby multilayer waveguides with linear profiles[刊,中]/全宏庆,康寿万,余守宪(北方交通大学物理系.北京(100044))∥光子学报.—1996,25...TN252 96042519多层线型分割法分析渐变形平板介质波导=Analysing graded-index planar waveguidesby multilayer waveguides with linear profiles[刊,中]/全宏庆,康寿万,余守宪(北方交通大学物理系.北京(100044))∥光子学报.—1996,25(1).—51—展开更多
TN252 2005031939 渐变折射率波导表面折射率的确定=Determination of surface index of graded-index waveguides[刊,中]／付国兰 (上海交通大学物理系．上海(200240)),曹庄琪…∥光学 学报．-2005,25(2)．-161-164 单调变化的渐变折...TN252 2005031939 渐变折射率波导表面折射率的确定=Determination of surface index of graded-index waveguides[刊,中]／付国兰 (上海交通大学物理系．上海(200240)),曹庄琪…∥光学 学报．-2005,25(2)．-161-164 单调变化的渐变折射率波导的表面折射率大于波导 基模的有效折射率,因而不能用传统的m-线方法测量。 利用分析转移矩阵(ATM)方法研究了渐变折射率波导中 的表面等离子波。展开更多
To achieve high quality factor and high-sensitivity refractive index sensor,a slot micro-ring resonator(MRR)based on asymmetric Fabry-Perot(FP)cavity was proposed.The structure consisted of a pair of elliptical holes ...To achieve high quality factor and high-sensitivity refractive index sensor,a slot micro-ring resonator(MRR)based on asymmetric Fabry-Perot(FP)cavity was proposed.The structure consisted of a pair of elliptical holes to form an FP cavity and a microring resonator.The two different optical modes generated by the micro-ring resonator were destructively interfered to form a Fano line shape,which improved the system sensitivity while obtaining a higher quality factor and extinction ratio.The transmission principle of the structure was analyzed by the transfer matrix method.The transmission spectrum and mode field distribution of the proposed structure were simulated by the finite difference time domain(FDTD)method,and the key structural parameters affecting the Fano line shape in the device were optimized.The simulation results show that the quality factor of the device reached 22037.1,and the extinction ratio was 23.9 dB.By analyzing the refractive index sensing characteristics,the sensitivity of the structure was 354 nm·RIU−1,and the detection limit of the sensitivity was 2×10−4 RIU.Thus,the proposed compact asymmetric FP cavity slot micro-ring resonator has obvious advantages in sensing applications owing to its excellent performance.展开更多
The equivalent refractive index（ERI） method is employed to analyze the function of the strip waveguide directional coupling modulator（SWM）. Through deducing the diagnostic equation of the Exmn mode of the four-lay...The equivalent refractive index（ERI） method is employed to analyze the function of the strip waveguide directional coupling modulator（SWM）. Through deducing the diagnostic equation of the Exmn mode of the four-layer media film waveguide equivalent to the SWM,the transmission constant of the symmetrical mode of the positive phase and negative one and the coupling length of powerful transference are obtained. The veracity of ERI is validated with the example of Ex11 basal mode under conditions of comparing the three results of ERI,EIM and Marcatili.展开更多
Optical waveguide is the main element in integrated optics. Therefore many numerical methods are used on these elements of integrated optics. Simulation response of an optical slab waveguide used in integrated optics ...Optical waveguide is the main element in integrated optics. Therefore many numerical methods are used on these elements of integrated optics. Simulation response of an optical slab waveguide used in integrated optics needs such numerical methods. These methods must be precise and useful in terms of memory capacity and time duration. In this paper, we study basic analytical and finite difference methods to determine the effective refractive index of AIGaAs-GaAs slab waveguide. Also, appropriate effective refractive index value is obtained with respect to number of grid points and number of matrix sizes. Finally, the validity of the obtained values by both methods is compared to using waveguide type.展开更多
Lanthanide has attracted much attention in the field of optical communications in recent years. Some property analyses on optical waveguide of Nd doped crystal Nd x Y 1-x A1 3(BO 3) 4 and Nd∶MgO∶LiNbO 3 are made in ...Lanthanide has attracted much attention in the field of optical communications in recent years. Some property analyses on optical waveguide of Nd doped crystal Nd x Y 1-x A1 3(BO 3) 4 and Nd∶MgO∶LiNbO 3 are made in this paper, followed by introduction of the methods of experimentation and theoretical calculation for the planar optical waveguides. The refractive index profiles of the optical waveguides are analyzed. The above work offers useful information for study on new type materials for optical communications.展开更多
文摘TN252 96042519多层线型分割法分析渐变形平板介质波导=Analysing graded-index planar waveguidesby multilayer waveguides with linear profiles[刊,中]/全宏庆,康寿万,余守宪(北方交通大学物理系.北京(100044))∥光子学报.—1996,25(1).—51—
文摘TN252 2005031939 渐变折射率波导表面折射率的确定=Determination of surface index of graded-index waveguides[刊,中]／付国兰 (上海交通大学物理系．上海(200240)),曹庄琪…∥光学 学报．-2005,25(2)．-161-164 单调变化的渐变折射率波导的表面折射率大于波导 基模的有效折射率,因而不能用传统的m-线方法测量。 利用分析转移矩阵(ATM)方法研究了渐变折射率波导中 的表面等离子波。
基金supported by Natural Science Foundation of Gansu Province(No.22JR5RA320).
文摘To achieve high quality factor and high-sensitivity refractive index sensor,a slot micro-ring resonator(MRR)based on asymmetric Fabry-Perot(FP)cavity was proposed.The structure consisted of a pair of elliptical holes to form an FP cavity and a microring resonator.The two different optical modes generated by the micro-ring resonator were destructively interfered to form a Fano line shape,which improved the system sensitivity while obtaining a higher quality factor and extinction ratio.The transmission principle of the structure was analyzed by the transfer matrix method.The transmission spectrum and mode field distribution of the proposed structure were simulated by the finite difference time domain(FDTD)method,and the key structural parameters affecting the Fano line shape in the device were optimized.The simulation results show that the quality factor of the device reached 22037.1,and the extinction ratio was 23.9 dB.By analyzing the refractive index sensing characteristics,the sensitivity of the structure was 354 nm·RIU−1,and the detection limit of the sensitivity was 2×10−4 RIU.Thus,the proposed compact asymmetric FP cavity slot micro-ring resonator has obvious advantages in sensing applications owing to its excellent performance.
文摘The equivalent refractive index（ERI） method is employed to analyze the function of the strip waveguide directional coupling modulator（SWM）. Through deducing the diagnostic equation of the Exmn mode of the four-layer media film waveguide equivalent to the SWM,the transmission constant of the symmetrical mode of the positive phase and negative one and the coupling length of powerful transference are obtained. The veracity of ERI is validated with the example of Ex11 basal mode under conditions of comparing the three results of ERI,EIM and Marcatili.
文摘Optical waveguide is the main element in integrated optics. Therefore many numerical methods are used on these elements of integrated optics. Simulation response of an optical slab waveguide used in integrated optics needs such numerical methods. These methods must be precise and useful in terms of memory capacity and time duration. In this paper, we study basic analytical and finite difference methods to determine the effective refractive index of AIGaAs-GaAs slab waveguide. Also, appropriate effective refractive index value is obtained with respect to number of grid points and number of matrix sizes. Finally, the validity of the obtained values by both methods is compared to using waveguide type.
文摘Lanthanide has attracted much attention in the field of optical communications in recent years. Some property analyses on optical waveguide of Nd doped crystal Nd x Y 1-x A1 3(BO 3) 4 and Nd∶MgO∶LiNbO 3 are made in this paper, followed by introduction of the methods of experimentation and theoretical calculation for the planar optical waveguides. The refractive index profiles of the optical waveguides are analyzed. The above work offers useful information for study on new type materials for optical communications.
