Analysis of CV mode selected resonator based on vectorial eigenvector method

• 来源期刊: 中国物理B（英文版）
• 关键词: laser resonators polarization polarization-selective devices lasers and laser optics
• 年，卷（期）: 2019,（2）
• 页码范围: 260-267
• 页数: 8页
• 语种: 英文
• DOI: 10.1088/1674-1056/28/2/024210

摘要

The vectorial eigenvector method was applied to compute the cylindrical vector (CV) modes of polarization-dependent resonators and multiple modes in the CV mode selected resonator were tracked. Then, the mode characteristics of CV mode selected resonator depending on the Fresnel number, geometry parameters, and polarization parameters were simulated. When the difference in reflection coefficient between radial and azimuthal polarization is greater than 0.021 for spherical semi-confocal cavity, the radially polarized TM01* mode most probably appears in the resonator due to its lowest loss, which is consistent with an azimuthal polarization-selective resonant cavity. Moreover, the appropriate phase shift factor contributes to suppress non-rotationally symmetrical modes, which promotes the selection of CV modes. The Fresnel number between 2 and 2.5 are the appropriate range of values when the value of geometry parameters g2 is 0.5, both of which decide the effective Fresnel number.