Fiber focusing lenses are designed to use for the laser output of a fiber With common standard fiber connection attachment. They are widely used in laser machining systems for welding, cutting, drilling and structuring applications. They are also used in the end-pump DPSS laser systems to focus the pump radiation output into the laser crystal. Daheng fiber focusing lens (GCO-29) employs an optimized design with multi-elements system. The focus spot has a fix magnification with the fiber core diameter. The lenses also characterized with designated working distance ideal for the laser machining applications. A range of magnifications for spot sizes are available off-the shelf.