We present a theoretical scheme for a Tm3+-doped radiation-balanced (athermal) continuous-wave fiber amplifier. This
mode of operation allows amplification without detrimental heating of the fiber with optical pumping. Athermal
amplification is realized by laser cooling in which waste heat is disposed of in the form of spontaneous fluorescence by
balancing the radiated and absorbed power. The athermal fiber amplification can be realized using a specially designed
distributed pumping scheme.