Amplitude Stabilization of a Terahertz Quantum Cascade Laser with an External Metamaterial Amplitude Modulator

B. Wei; S. J. Kindness; N. W. Almond; R. Wallis; Y. Wu; Y. Ren; P. Braeuninger-Weimer; S. Hofmann; H. E. Beere; D. A. Ritchie; R. Degl'lnnocenti

doi:10.1364/CLEO_SI.2018.STu4D.5

Conference on Lasers and Electro-Optics
OSA Technical Digest (online) (Optica Publishing Group, 2018),
paper STu4D.5
•https://doi.org/10.1364/CLEO_SI.2018.STu4D.5

Amplitude Stabilization of a Terahertz Quantum Cascade Laser with an External Metamaterial Amplitude Modulator

B. Wei, S. J. Kindness, N. W. Almond, R. Wallis, Y. Wu, Y. Ren, P. Braeuninger-Weimer, S. Hofmann, H. E. Beere, D. A. Ritchie, and R. Degl'lnnocenti

CLEO: Science and Innovations 2018

San Jose, California United States
13–18 May 2018
ISBN: 978-1-943580-42-2

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Terahertz QCLs (STu4D)

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B. Wei, S. J. Kindness, N. W. Almond, R. Wallis, Y. Wu, Y. Ren, P. Braeuninger-Weimer, S. Hofmann, H. E. Beere, D. A. Ritchie, and R. Degl'lnnocenti, "Amplitude Stabilization of a Terahertz Quantum Cascade Laser with an External Metamaterial Amplitude Modulator," in Conference on Lasers and Electro-Optics, OSA Technical Digest (online) (Optica Publishing Group, 2018), paper STu4D.5.

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Abstract

Terahertz laser sources with stable power levels are requested for astronomical, communication and spectroscopic applications. Here we demonstrate the amplitude stabilization of a terahertz quantum cascade laser with a graphene loaded split-ring-resonator array. This integrated amplitude modulator operates at room temperature and is capable of actively modulating the quantum cascade laser power level and stabilizing the power output via a PID loop. The laser power fluctuation was reduced from 1.82% to 0.19% of the total power.

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