Optromix-DSE model is a single-frequency narrow linewidth low noise 780 nm (775 nm, 778 nm) wavelength laser with a wide-range thermal wavelength tuning and a fast piezo tuning using an external PZT driver. The Optromix-DSE key parameter is the ultra-narrow linewidth based on the longitudinal single mode. In the standard version, this model has an optical output to the free space from the laser head, but optionally, it can be equipped with the PM fiber output. Optromix-DSE can be computer controlled via USB connection using software supplied with the device. This extra-precision laser is perfect for atom cooling and trapping.