Efficient sum-frequency generation in epitaxial $\mathrm{Ga}\mathrm{As}∕\mathrm{Al}\mathrm{Ga}\mathrm{As}$ waveguides is reported. Phase matching is achieved for type II nonlinear interaction using Bragg reflection waveguides. Continuous-wave signal and pump in $1550\mathrm{nm}$ wavelength window were used for upconversion of photons to the $775\mathrm{nm}$ region. For a pump and signal with powers of $0.69\mathrm{mW}$ and $0.35\mathrm{mW}$ , sum-frequency power of $35\mathrm{nW}$ was measured. The normalized conversion efficiency was estimated to be $298\%{\mathrm{W}}^{-1}{\mathrm{cm}}^{-2}$ in a device with a length of $2.2\mathrm{mm}$ . The bandwidth of the process was found to exceed $60\mathrm{nm}$ .