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A low power-consumption distributed feedback quantum cascade laser (DFB-QCL) is developed for gas-sensing in 7 μm wavelength region. The threshold power-consumption was as low as 0.93 W with the sufficient output power of 20 mW at 20°C under continuous-wave condition. In addition, it maintained a single-mode operation between −40 and 50°C without a mode-hopping, leading to a total wavelength shift...
First successful operation of a buried-ridge-type GaInNAs-DFB laser was realized. Under CW condition, it oscillated with a threshold current of 18 mA at 25degC, and it could oscillate up to 110degC with good I-L linearity and with SMSR > 40 dB.
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