A beam-homogenizing device consisting of a short tip of silver-halide infrared fiber eliminates the low-order multimode effect generated by bending of hollow guides. A series of experiments with a CO2 laser shows that the solid fiber functions as a homogenizer with a small insertion loss of 0.2dB.
© 1997 Optical Society of America
Yuji Matsuura, Mitsunobu Miyagi, Alla German, Lev Nagli, and Abraham Katzir, "Silver-halide fiber tip as a beam homogenizer for infrared hollow waveguides," Opt. Lett. 22, 1308-1310 (1997)