The linewidth of the laser emission is-5nm when a prism is used as the dispersive element and is reduced even further to-lnm when the prism is replaced by a diffraction grating.

• 当用棱镜作为色散元件时,其线宽约为5毫微米; 如果用衍射光栅代替棱镜则线宽可窄至1毫微米左右。