Fluorotellurite　glass　is　regarded　as　an　ideal　host　material　for　infrared　fiber　lasers　due　to　its　relatively　low　phonon　energy　and　high　rare-earth　doping　capacity.　However,　its　emission　efficiency　is　limited　by　strong　absorption　of　hydroxyl　impurities　(OH−)　in　the　glass,　which　typically　originate　from　the　raw　materials　and　their　surrounding　environment.　In　this　study,　we　thoroughly　investigated　the　impact　of　raw　materials　and　corundum　crucible　under　various　conditions.　A　series　of　Er3+-doped　fluorotellurite　glasses　was　prepared　using　a　high-temperature　and　low-pressure　pre-drying　technique,　achieving　a　minimum　OH−　absorption　coefficient　of　0.009　cm−1,　representing　a　99.7　%　reduction　compared　to　the　undried　sample.　Moreover,　the　integral　area　of　peaks　at　1550　nm　and　2710　nm　of　the　well-dried　sample　increased　by　947　%　and　1023　%,　respectively,　compared　to　the　undried　sample.　These　results　demonstrate　that　fluorotellurite　glass　with　low　OH−　content　holds　promising　potential　for　development　in　infrared　fiber　lasers.　©　2024