RUI: Effect of optical feedback on vertical-cavity surface-emitting lasers

该RUI实验研究计划将系统地研究光反馈对垂直腔面发射激光器（VCSEL）的影响，特别是使用光反馈控制VCSEL输出的可能性。质子注入和氧化VCSEL将实验研究，以下的VCSEL的空间和光谱特性的变化时，不同种类的光反馈，非偏振，偏振，和空间滤波的反馈，被应用。目标是找到条件、反馈水平、外腔长度、反馈相位等，在此条件下，即使注入电流相对较高，VCSEL也可以单模和/或单极化工作。PI还将检查VCSEL进入混沌振荡状态的路线，并将其与现有的理论预测进行比较。该计划的更广泛的影响将是通过培训本科生在技术要求高的领域工作。

This RUI experimental research program will systematically investigate the effect of optical feedback on vertical-cavity surface-emitting lasers (VCSEL), especially the possibility of using optical feedback to control the output from the VCSEL. Both proton-implanted and oxidized VCSELs will be studied experimentally, following the change in spatial and spectral characteristics of the VCSEL when different kinds of optical feedback, non-polarized, polarized, and spatially filtered feedback, are applied. The goal is to find conditions, feedback level, external cavity length, feedback phase, etc., under which the VCSEL can operate with single-mode and/or single polarization even if the injection current is relatively high. The PI will also examine the route for the VCSEL to enter the regime of chaotic oscillation and compare it with the existing theoretical prediction. The broader impact of the program will be through the training of undergraduate students to work in a technically demanding field.