Selective lasing of InGaAs quantum-wire array on a V-grooved GaAs substrate by distributed optical feedback

Distributed-feedback (DFB) lasers were fabricated by using strained InGaAs quantum-wire (QWR) arrays on V-grooved GaAs substrates as an active grating . After characterizing the luminescence from the QWR's and parasitic quantu m wells (QWL's), a DFB laser cavity incorporating such a QWR array with its emission wavelength matched to the Bragg wavelength was designed and fabri cated. The wavelength selectivity of the DFB cavity was found to strongly s upport the QWR emission, and DFB lasing from QWR gain up to 145K; has been achieved under pulsed current, The emission from the parasitic QWL's was su ppressed by the DFB filtering and the loss induced by coupling to radiation modes. The DFB cavity was shown to be essential for obtaining lasing from QWR's on V-grooved substrates.