Multimodal spectral control of a quantum-dot diode laser for THz difference frequency generation

R. Leyman, D. I. Nikitichev, N. Bazieva, E. U. Rafailov

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7 Citations (Scopus)


Generation of stable dual and/or multiple longitudinal modes emitted from a single quantum dot (QD) laser diode (LD) over a broad wavelength range by using volume Bragg gratings (VBG’s) in an external cavity setup is reported. The LD operates in both the ground and excited states and the gratings give a dual-mode separation around each emission peak of 5 nm, which is suitable as a continuous wave (CW) optical pump signal for a terahertz (THz) photomixer device. The setup also generates dual modes around both 1180 m and 1260 nm simultaneously, giving four simultaneous narrow linewidth modes comprising two simultaneous difference frequency pump signals.
Original languageEnglish
Article number171107
Number of pages3
JournalApplied Physics Letters
Publication statusPublished - 2011


  • Bragg gratings
  • laser diodes
  • quantum-dot diode laster

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