Amplitude Stabilization of a Terahertz Quantum Cascade Laser with an External Metamaterial Amplitude Modulator
- Resource Type
- Conference
- Authors
- Wei, B.; Kindness, S. J.; Almond, N. W.; Wallis, R; Wu, Y.; Ren, Y.; Braeuninger-Weimer, P.; Hofmann, S.; Beere, H. E.; Ritchie, D. A.; Deglalnnocenti, R
- Source
- 2018 Conference on Lasers and Electro-Optics (CLEO) Lasers and Electro-Optics (CLEO), 2018 Conference on. :1-2 May, 2018
- Subject
- General Topics for Engineers
Photonics and Electrooptics
- Language
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.