Improved comb and dual-comb operation of terahertz quantum cascade lasers utilizing a symmetric thermal dissipation

  • Wang C
  • Li Z
  • Liao X
  • et al.
4Citations
Citations of this article
6Readers
Mendeley users who have this article in their library.
Get full text

Abstract

In the terahertz frequency range, the quantum cascade laser (QCL) is a suitable platform for the frequency comb and dual-comb operation. Improved comb performances have been always much in demand. In this work, by employing a symmetric thermal dissipation scheme, we report an improved frequency comb and dual-comb operation of terahertz QCLs. Two configurations of cold fingers, i.e., type A and B with asymmetric and symmetric thermal dissipation schemes, respectively, are investigated here. A finite-element thermal analysis is carried out to study the parametric effects on the thermal management of the terahertz QCL. The modeling reveals that the symmetric thermal dissipation (type B) results in a more uniform thermal conduction and lower maximum temperature in the active region of the laser, compared to the traditional asymmetric thermal dissipation scheme (type A). To verify the simulation, experiments are further performed by measuring laser performance and comb characteristics of terahertz QCLs emitting around 4.2 THz mounted on type A and type B cold fingers. The experimental results show that the symmetric thermal dissipation approach (type B) is effective for improving the comb and dual-comb operation of terahertz QCLs, which can be further widely adopted for spectroscopy, imaging, and near-field applications.

Cite

CITATION STYLE

APA

Wang, C., Li, Z., Liao, X., Guan, W., Ma, X., Zhou, K., … Li, H. (2021). Improved comb and dual-comb operation of terahertz quantum cascade lasers utilizing a symmetric thermal dissipation. Optics Express, 29(18), 29412. https://doi.org/10.1364/oe.433938

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free