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10 March 2020 High-performance THz QCL frequency combs (Conference Presentation)
Andres Forrer, Lorenzo Bosco, Mattias Beck, Jérôme Faist, Giacomo Scalari
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Proceedings Volume 11288, Quantum Sensing and Nano Electronics and Photonics XVII; 112881L (2020) https://doi.org/10.1117/12.2546349
Event: SPIE OPTO, 2020, San Francisco, California, United States
Abstract
A broadband, Cu-Cu THz quantum cascade laser is presented. The device shows an 50% improved dynamical range and doubled peak power in pulsed compared to Au-Au devices. The pulsed maximum lasing temperature was increased from 105 K to 133 K. In CW similar bandwidths for Cu-Cu and Au-Au devices are observed with an increased temperature performance. At 77 K the emitted power of the device is reduced by 57% compared to 30 K. At this temperature a single narrow beatnote is observed, which can be locked to an RF synthesizer. THz comb emission spans roughly 800 GHz.
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Andres Forrer, Lorenzo Bosco, Mattias Beck, Jérôme Faist, and Giacomo Scalari "High-performance THz QCL frequency combs (Conference Presentation)", Proc. SPIE 11288, Quantum Sensing and Nano Electronics and Photonics XVII, 112881L (10 March 2020); https://doi.org/10.1117/12.2546349
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KEYWORDS
Terahertz radiation
Quantum cascade lasers
Continuous wave operation
Frequency combs
Pulsed laser operation
Waveguides
Astatine
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