... depth,smothness,precision demand higher area is irrepleceable advantage;4,Optical fiber laser is the medium mixed yb double-clad fiber, M2 ... the time of up to 100000 hours;6,Optical fiber laser integrated structure, no optical pollution, no power of the coupling loss, compact ... 't possess the high efficiency and reliability;7,Optical fiber laser is no need for any maintenance (not including adjust or ...