增益导引(1×10)列阵波导CO_2激光器的实验研究

Experimental study on gain-guided waveguide array (1×10) CO_2 laser

1 引言 列阵波导激光器的发展旨在提高激光功率的同时使器件的几何尺寸更加紧凑。以往的实验表明,空心脊波导结构在三列阵以上时便难以获得波导间相位的完全锁定,而交叉波导结构除外加相移波片外,也只能获得反对称模输出。 本文报告一种新结构的列阵波导CO_2激光器。其基本思想与增益导引半导体激光器列阵是一样的,即在波导中通过空间上为周期分布的增益区来获得列阵激光束,由相邻光束间辐射场的耦合来实现相位的同步锁定。

A new type of waveguide array CO2 laser excited by RF discharge is reported. In the device, laser beams are guided by means of periodic gain regions distributed in lateral space and form the one-dimensional array. The experiments indicate that the 1×10 array laser is perfectly locked in phase. The symmetrical and asymmetrical distributions in far-field have been observed.