Evidence for frequency comb emission from a Fabry-Pérot terahertz quantum-cascade laser.
نویسندگان
چکیده
We report on a broad-band terahertz quantum-cascade laser (QCL) with a long Fabry-Pérot ridge cavity, for which the tuning range of the individual laser modes exceeds the mode spacing. While a spectral range of approximately 60 GHz (2 cm(-1)) is continuously covered by current and temperature tuning, the total emission range spans more than 270 GHz (9 cm(-1)). Within certain operating ranges, we found evidence for stable frequency comb operation of the QCL. An experimental technique is presented to characterize frequency comb operation, which is based on the self-mixing effect.
منابع مشابه
Self-starting harmonic frequency comb generation in a quantum cascade laser
1Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA. 2Department of Information Technology and Electrical Engineering, ETH Zurich, 8092 Zurich, Switzerland. 3Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843, USA. 4Pendar Technologies, 30 Spinelli Place, Cambridge, MA 02138, USA. 5Thorlabs Quantum E...
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عنوان ژورنال:
- Optics express
دوره 22 25 شماره
صفحات -
تاریخ انتشار 2014