Blue up-conversion laser in Tm3+doped ZBLAN glass fiber

An 1120nm Raman fiber laser pumped Tm
³
+-doped ZBLAN fiber up-conversion laser was demonstrated with blue output power levels up to 116mW. The effects of the reflectivity of the output coupler mirrors on blue laser were investigated. Based on our experimental results, we also found that there exists a competition between photodegradation and photocuring in the operation of blue fiber laser, which can affect the maximum output power of blue fiber laser greatly.