Experimental study demonstrates lasing emission in a terahertz quantum cascade laser, indicating the viability of cryogen-free thermoelectric cooling for compact devices.
We demonstrate the first lasing emission of a thermo-electrically cooled terahertz quantum cascade laser (THz QCL). A high temperature three-well THz QCL emitting at 3.8 THz is mounted to a novel five-stage thermoelectric cooler reaching a temperature difference of ΔT = 124 K. The temperature and time-dependent laser performance is investigated and shows a peak pulse power of 4.4 mW and a peak average output power of 100 μW for steady-state operation.
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Kainz et al. (2019) studied this question.
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