Liquid-cooled 24 W mid-infrared Er:ZBLAN fiber laser.
A 24 W liquid-cooled CW 3 microm fiber laser with a multimode-core Er-doped ZBLAN fiber has been developed. The output power of 24 W and an optical-to-optical efficiency of 14.5% (with respect to incident pump power) were obtained with 975 nm diode pumping. Efficient cooling was implemented by a combination of fluid cooling over the entire length of the fiber and conductive cooling at both end faces of the fiber. Consequently, stable high-power operation was demonstrated. To our knowledge, this is the highest output power obtained by a 3 microm fiber laser. Furthermore, the high power can be further scaled up, since the output power in the present work is limited only by the available pump power.
Tokita
Shigeki
S
Advanced Research Center for Beam Science, Institute for Chemical Research, Kyoto University, Gokasho, Uji,Kyoto 611-0011, Japan. tokita@laser.kuicr.kyoto-u.ac.jp
Murakami
Masanao
M
Shimizu
Seiji
S
Hashida
Masaki
M
Sakabe
Shuji
S