Phase‐locked operation of coupled pairs of grating‐surface‐emitting diode lasers

Grating‐surface emission from phase‐locked monolithic pairs of grating‐surface‐emitting diode lasers has been observed for the first time. Near‐diffraction‐limited far fields of 0.06°, spectra and power versus current plots of the coherent emission from the three second‐order distributed Bragg reflectors which form the laser cavity for two collinear gain sections are presented. The results suggest that linear arrays of grating‐surface emitters can be formed by connecting additional gain‐grating sections in series.