19 February 2018 3.35-μm distributed feedback interband cascade lasers with top grating
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Abstract
Here we present the design and results of distributed feedback (DFB) interband cascade lasers (ICL) with 1st order top surface grating. A partially corrugated sidewall waveguide was designed and implemented to suppress high order lateral modes. The DFB ICLs have 4mm long cavities and 4.5 μm wide base line ridge waveguide, and are mounted epi-up on SiC submounts. Continuous-wave (CW) operation of the DFB ICLs was demonstrated. The lasing wavelengths re around 3.3 μm at 25°C, and the measured side mode suppression ratio is 30 dB. The best device with low detuning of gain peak and DFB Bragg wavelength showed a maximum output power and a maximum wall plug efficiency of 46 mW and 2%, respectively, at 25 °C.
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Feng Xie, Michael Stocker, John Pham, Frederick Towner, Kun Shen, Jie Wang, Kevin Lascola, "3.35-μm distributed feedback interband cascade lasers with top grating", Proc. SPIE 10553, Novel In-Plane Semiconductor Lasers XVII, 105530Q (19 February 2018); doi: 10.1117/12.2291851; https://doi.org/10.1117/12.2291851
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