Optically pumped quantum-dot Cd(Zn)Se/ZnSe laser and microchip converter for yellow–green spectral region

The room temperature laser generation in the yellow—green (λ = 558.5—566.7 nm) spectral range has been demonstrated under optical pumping by a pulsed nitrogen laser of Cd(Zn)Se/ZnSe quantum dot heterostructures. The maximum achieved laser wavelength was as high as λ = 566.7 nm at a laser cavity length of 945 μm. High values of both the output pulsed power (up to 50 W) and the external differential quantum efficiency (~60%) were obtained at a cavity length of 435 μm. Both a high quality of the laser heterostructure and a low lasing threshold (~2 kW cm^-2) make it possible to use a pulsed InGaN laser diode as a pump source. A laser microchip converter based on this heterostructure has demonstrated a maximum output pulse power of ~90 mW at λ = 560 nm. The microchip converter was placed in a standard TO-18 (5.6 mm in diameter) laser diode package.