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研究了一种新型光纤激光器——消逝波激励的回音壁模式光纤激光器的偏振特性.通过实验发现,在两种不同的光泵浦条件下,消逝波激励的回音壁模式光纤激光辐射具有不同的偏振特性.当泵浦光严格沿光纤轴向泵浦时,回音壁模式激光只存在横电波,激光辐射点的光电矢量偏振方向沿光纤径向,由此形成一种特殊的径向偏振激光辐射;当泵浦光沿光纤的近轴向泵浦时,回音壁模式激光既存在横电波又存在横磁波,由此形成径向和轴向混合偏振的激光辐射.根据消逝波激励的回音壁模式光纤激光的辐射机制,对观察到的激光偏振特性给予了合理的解释.
The polarization characteristics of a new type of fiber laser-evanescent-wave-driven echo-wall mode fiber laser are studied.The experimental results show that evanescent-wave-driven echo-wall mode fiber laser radiation has two different optical pumping conditions, Polarization Properties When the pump light is pumped strictly along the axial direction of the fiber, there are only transverse electric waves in the echo wall mode laser. The polarization direction of the photoelectric vector of the laser radiation point is along the optical fiber radial direction, thereby forming a special radial polarized laser radiation ; When the pump light is pumped along the paraxial direction of the optical fiber, both the transverse electromagnetic wave and the transverse magnetic wave exist in the echo wall mode laser, thereby forming the radial and axial mixed polarization laser radiation. According to evanescent wave-excited whispering gallery mode The radiation mechanism of the fiber laser gives a reasonable explanation of the observed laser polarization characteristics.