Flat-topped emission centred at 1 250 nm from quantum dot superluminescent diodes

  • D. Childs
  • K.M. Groom
  • S.K. Ray
  • H.Y. Liu
  • M. Hopkinson
  • R.A. Hogg


We present a method for tailoring a broadband and flat-topped emission spectrum in quantum dot superluminescent diodes based upon modification of the dots-in-compositionally-modulated-well (DCMWELL) technique. We demonstrate flat-topped emission with 95 nm full width at half maximum (FWHM), centred at 1 250 nm, and with output power in excess of 8 mW.