Abstract: A fiber cleaving device comprising a clamp assembly, central moveable stage, right moveable stage, and diamond component. The diamond component comprises a diamond and a diamond oscillator. The clamp assembly secures a piece of bare glass fiber so that it is oriented roughly perpendicularly to the cutting edge of the diamond. The central moveable stage moves the diamond oscillator forward so that the cutting edge of the diamond comes into contact with the piece of bare glass fiber. The right moveable stage pulls the piece of bare glass fiber taught after it has been secured by the clamp assembly. The diamond oscillator is configured so that the diamond cleaves the piece of bare glass fiber at an effective cutting angle of approximately forty-five degrees or, alternately, in the range of thirty to sixty degrees.