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  • 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference
  • OSA Technical Digest (Optica Publishing Group, 2019),
  • paper cc_2_2

Homogeneous, bound-to-continuum THz QCL Active Region design featuring 1.65 THz emission bandwidth in CW

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Abstract

THz quantum-cascade lasers (QCLs) are compact semiconductor sources shown to emit over an octave in spectral bandwidth in CW operation [1]. The generation of frequency combs by THz QCLs, based on their internal four-wave mixing featuring narrow beatnotes, was shown and verified for various structures [1,2,4]. The emission over a large spectral range can be achieved by either optimizing the gain and its dispersion [1], cavity mode controlling [3] or compensating the material dispersion by designing a negative cavity dispersion [3]. The wide bandwidth is in general reached by stacking multiple active region (AR) designs to a so called heterogeneous structure featuring a broad gain.

© 2019 IEEE

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