Compact Dual-Wavelength InAs/GaAs Quantum-Dot External-Cavity Laser Stabilized by a Single Volume Bragg Grating

N. S. Daghestani, M. A. Cataluna, G. Ross, M. J. Rose

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    13 Citations (Scopus)


    Stable dual-wavelength operation has been achieved by combining a single volume Bragg grating with a quantum-dot-based gain medium in a compact external cavity configuration, with extreme ease of alignment. The dual-wavelength output was centered at 1179.9 and 1182.8 nm, with each mode exhibiting a spectral bandwidth similar to 0.2 nm. A maximum output power of 186 mW was achieved, with both modes displaying a sidemode suppression-ratio (SMSR) of over 34 dB. Furthermore, the SMSR remained well over 26 dB within a broad current range (350-1000 mA) and temperature range (10.5 degrees C-40 degrees C). Unlike previous dual-wavelength configurations that used quantum-well-based devices, the quantum-dot-based laser here presented displays improved stability and resilience to changes in operating temperature and current.

    Original languageEnglish
    Pages (from-to)176-178
    Number of pages3
    JournalIEEE Photonics Technology Letters
    Issue number3
    Publication statusPublished - 1 Feb 2011


    • Quantum-dot lasers
    • semiconductor lasers
    • terahertz technology
    • volume Bragg gratings
    • DIODE

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