Fiber laser is the future development direction for the high energy lasers. This paper describs two kinds of optical coatings for fiber laser

including long and short wave pass filters. The one characteristic of fiber laser coatings lies in that coatings should separate two closely wavelength light including laser pump wavelength (980 nm) and laser irradiation wavelength(1 050~1 100 nm). At the same time

the coatings should have high laser damage threshold.