The 157 nm laser micro-ablation characteristics for optical fibers are investigated,and a 3D-microstructure of optical fiber is fabricated.Experimental results show that,with increasing the laser shot numbers,the ablation rate of fused silica fibers will reduce gradually.The larger laser spot is preferable to enhance the ablation rate.The laser repetition rate is preferably not more than 25 Hz to improve the quality of ablated micro-holes.The 157 nm laser is available for ablating three-dimensional micro-st...