The continuous-wave single-mode operation of edge-emitting diode laser based on dual-sided non-quarterwave Bragg reflection waveguide BRW was demonstrated at room temperature． A low-index core was utilized in the laser． The ridge BRW lasers BRLs exhibited an ultra-narrow twin-beam output． Single longitudinal mode emission with a very small spectral linewidth of 0． 052 nm was measured． The lasing spectra showed a periodic modulation in the envelope with a mode spacing of approximately 3． 3 nm． When the injection current of the BRLs was beyond 300 mA a large mode hopping of the emission wavelength was observed．

We designed a new type of plasmonic laser source based on the Bragg reflection waveguide． This laser source is simple in structure and convenient for integration． It works under room temperature electrical pumping condition and outputs plasmonic laser with more than milliwatt power which is much larger than those demonstrated plasmonic laser sources with power of nano-watt scale． The proposed laser works at 808 nm． The tilted light beam offered by Bragg reflection waveguide directly couples into surface plasmon polaritons in our quasi-Otto configuration．