期刊
PHOTONICS
卷 7, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/photonics7010009
关键词
THz QCL; frequency comb; RF injection; broadband
类别
资金
- European Research Council [724344]
- Schweizerischer National-fonds zur Forderung derWissenschaftlichen Forschung [200020-165639]
- Swiss National Science Foundation (SNF) [200020_165639] Funding Source: Swiss National Science Foundation (SNF)
- European Research Council (ERC) [724344] Funding Source: European Research Council (ERC)
We report about RF injection locking of an homogeneous THz quantum cascade laser operating at 3 THz central frequency. The extremely diagonal nature of the optical transition, combined with low-loss copper-based double-metal waveguides, allow CW operation up to 105 K and CW power in excess of 5.6 mW measured at 80 K. Terahertz emission spanning up to 600 GHz, together with a narrow beatnote, indicate comb operation at 80 K, and strong RF injection clearly modifies the laser spectrum up to 700 GHz spectral bandwidth making these devices ideal candidates for an on-chip dual comb spectrometer.
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