Temperature dependence and single-mode tuning behavior of second-harmonic generation in quantum cascade lasers
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The temperature dependence and single-mode tuning behavior of second-harmonic generation (SHG) in quantum cascade (QC) lasers with active regions were discussed. The SHG was demonstrated up to 250 K heat sink temperature as well as tunable single-mode emission around 7.0 and 3.5 μm. Single mode and tunable SHG was found to be measured from single-mode QC distributed feedback lasers operating at the fundamental pumps. It was observed that the thermal tuning results in a tuning rate for the SHG emission of ∼0.2 nm/K for temperature above ∼100 K.
author list (cited authors)
Gmachl, C., Owschimikow, N., Belyanin, A., Sergent, A. M., Sivco, D. L., Peabody, M. L., Cho, A. Y., & Capasso, F.