Longitudinal single mode emission from ZnSe-based laser diodes with first order distributed Bragg reflectors has been achieved. The emission energy could be varied in the green spectral range over more than 80 meV by changing the grating period from 97.7 to 102.2 nm. The variation of the lasing threshold current in this range is explained as a consequence of the optical gain spectrum of the structure. Wavelength fine tuning with a rate of&Dgr;&lgr;/&Dgr;T=2.9×10−2 nm/Kwas realized by temperature variation. ©1997 American Institute of Physics.