External cavity terahertz quantum cascade laser sources based on intra-cavity frequency mixing with 1.2–5.9 THz tuning range

@inproceedings{Jiang2014ExternalCT,
  title={External cavity terahertz quantum cascade laser sources based on intra-cavity frequency mixing with 1.2–5.9 THz tuning range},
  author={Yifan Jiang and Karun Vijayraghavan and Seungyong Jung and Frederic Demmerle and Gerhard B{\"o}hm and Markus Christian Amann and Mikhail Belkin},
  year={2014}
}
We discuss the design and operation of widely-tunable terahertz sources based on Cherenkov intra-cavity difference-frequency generation in mid-infrared quantum cascade lasers. Laser chips are integrated into a Littrow-type external cavity system. Devices demonstrate continuous terahertz emission tuning at room temperature with a record tuning range from 1.2 THz to 5.9 THz and peak power output varying between 5 and 90 μW, depending on the operating frequency. Beam steering of terahertz… CONTINUE READING

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