The short cavity fiber lasers with distributed feedback and distributed Bragg reflection structures are fabricated by using direct ultraviolet exposure on the photosensitive Er/Yb co-doped single mode fibers respectively produced in Nufern and CorActive companies. The experimental results show that the quenching effect related to temperature exists in the Er/Yb co-doped fibers. In the process of laser slope efficiency test, the laser output power suddenly falls down when the pump power reaches certain value. But when an auxiliary heat dissipation is given to the laser resonant cavity, the laser conversion efficiency increases by certain value. The successive power measurement results of the same laser show that the laser efficiency measured later is always lower than that measured just after its fabrication. Moreover, the output power decline at high pump power and the temperature-sensitive situation always exist.