||2 micron laser has certain characteristics and applications that visible lasers cannot provide as good, such as gas sensing, surgery, free-space transmission, high-gain amplifiers, IR-LiDAR, hazard prevention and rescue, cutting and jointing in manufacture, biomedical application, etc.|
It is well known that rare-earth ions can be incorporated into single mode silica fiber, which can then form the basis of efficient fiber lasers. Thulium has emission peaks located at eye-safe wavelengths that spanning 400 nm, ranging from 1700 to 2100 nm. Out of the cross relaxation property such that it could has low lasing threshold by pumping with 793nm laser diodes which is available semiconductor laser diode. Thulium is one of the best candidate for an 2 μm fiber laser material.
The purpose of this study is to develop in-house technology for 2 micron Thulium-doped laser fiber within the specification of Nufern’s SM-TSF-9/12. Until now, we have successfully manufactured different doping concentration of thulium doped fibers, we choice fiber Bragg gratings as the cavity mirrors to generate 2μm fiber lasers, and measure its slope efficiency to adjust the manufacture parameter.
In term of 2 micron laser applications, we using 2 micron laser as the energy source with Polyol process which is a method related to the growth of silver nanowires and make a comparison between 2 micron laser, CO2 laser and Nd：YAG laser. We also have a try on Poly(methyl methacrylate) sintering.