An optical method for wavelength fine-selection in optical spectrum analysers

This letter describes a novel optical method for wavelength fine-selection in the optical spectrum analysers(OSAs) for dense wavelength division multiplexing (DWDM) applications. The proposed new method employs a 'refractive optical lever'system consisting of a rotating optical wedge prism.A new OSA system based on Littman-type monochromator is proposed and the wavelength selection accuracy and resolution of OSA that has included such an optical lever system have been improved by a factor of 20 to100 depending on the wedge angle and offset orientation angle of the optical wedge prism. This proposed 'refractive optical lever' may also simplify the rotation mechanism of the mirror in the commercially available OSAs.     

傅里叶变换镜头的象差计算程序

本文介绍一个在Apple-Ⅱ微机上使用的傅里叶变换镜头象差计算程序。该程序安排了几个特殊功能,并且适于普通光学系统的计算。一、引言应用微机进行光学设计具有许多大机无法比拟的优点。随着微机的普及,用它来完成光学系统的设计将是一个方向,特别能为     

An optical method for wavelength fine-selection in optical spectrum analysers

This letter describes a novel optical method for wavelength fine-selection in the optical spectrum analysers (OSAs) for dense wavelength division multiplexing (DWDM) applications. The proposed new method employs a 'refractive optical lever' system consisting of a rotating optical wedge prism. A new OSA system based on Littman-type monochromator is proposed and the wavelength selection accuracy and resolution of OSA that has included such an optical lever system have been improved by a factor of 20 to 100 depending on the wedge angle and offset orientation angle of the optical wedge prism. This proposed 'refractive optical lever' may also simplify the rotation mechanism of the mirror in the commercially available OSAs.     

光在类锥形梯度折射率纤维中的传播——波动光学研究

本文从近轴波动方程出发,寻求光在类锥梯度折射率纤维中传播的解析解。研究了在纤维中传播的高斯光束光斑半径、波面曲率半径、光束强度分市的变化规律,并讨论了准锥形近似及准几何光学传播条件。     

高斯光束在梯度折射率纤维中的传播—振幅与光斑分布的解析解族

从近轴波动方程出发，导出在梯度折射率纤维中传播的高斯光束振幅与光斑分布的解析解族。从这一结果可得到高斯光束在抛物型、锥形、类锥形梯度折射率纤维中传播的一系列特解。