0.84 terahertz self modulation in a dual transverse mode 980 nm laser

Summary form only given. We report the use ofa dual transverse mode diode laser for the generation of THz modulated light. Simultaneous operation on both transverse modes and subsequent mode-locking of the longitudinal wavevectors of these modes leads to a frequency difference in the 0.5-1.0 THz range (depending on the waveguide design parameters.) We demonstrate nearly 100% self modulation at 0.84 THz with an output power of 1.9 mW.