A diode-pumped Q-switched Tm-doped double-clad fluoride fiber laser is reported providing up to $90\mathrm{\mu }\mathrm{J}$ pulse energy ( $160\mathrm{ns}$ , $100\mathrm{kHz}$ , i.e., $9\mathrm{W}$ of average power). The dependence of the fiber laser’s repetition rate on pump power and modulator repetition rate was investigated. By amplification even higher pulse energies of $410\mathrm{\mu }\mathrm{J}$ could be generated. In a second stage of the setup the Q-switched fiber laser serves as a pump for a gain-switched tunable ${\mathrm{Cr}}^{2+}:\mathrm{ZnSe}$ laser. The pulse energies reported are to the author’s knowledge the highest generated by Tm-doped fluoride fiber lasers or amplifiers today.