| 1. | The former has compact structure ; , little cavity loss , higher coupling efficiency , and higher superposition efficiency . but there is no enough room for other devices . the latter overcome this problem , but the diffraction loss and mirror loss is increased
六镜环形谐振腔可以确保角度很小，但总腔长较长，腔内衍射及腔镜吸收和不完全反射造成的损耗较大，同样很难得到稳定的双波长激光输出。 |
