Development of a Lens-less Mid-Infrared Laser Head for the Optical Fiber Tip Oscillation to Apply to Therapeutic Treatment

We have reported the optical fiber tip oscillation laser that has a Er,Cr:YAGG laser crystal and coupling lenses on the tip of a silica fiber outputs 2.8 μm laser pumped by laser diode.  The average output power of 1.0 W was achieved from the lens-less laser head during a squire wave modulation for suppressing heat generation.

Electronics and Communications in Japan