HIGH-POWER CW FIBER-LASER

摘要

A CW fiber- laser includes a gain fiber (42) having a reflector (44) proximity-coupled to one end (42A), with the other end left (42B) uncoated. A laser resonator is defined by the reflector (44) and the uncoated end (42B) of the gain-fiber. Pump - radiation from two fast-axis diode-laser bar stacks (46) is combined and focused into the uncoated end (42B) of the gain - fiber for energizing the fiber. Laser radiation (37) resulting from the energizing is delivered from the uncoated end of the gain -fiber and separated from the pump - radiation by a dichroic mirror (31). A coupler (60) is provided at the uncoated end (42B) of the fiber to absorb pump light not guided in the cladding of the fibre (42).