Beam shaping in high-power broad-area quantum cascade lasers using optical feedback - Université Pierre et Marie Curie
Journal Articles Scientific Reports Year : 2017

Beam shaping in high-power broad-area quantum cascade lasers using optical feedback

Louise Jumpertz
  • Function : Author
Mathieu Carras
  • Function : Author
Frédéric Grillot
  • Function : Author

Abstract

Broad-area quantum cascade lasers with high output powers are highly desirable sources for various applications including infrared countermeasures. However, such structures suffer from strongly deteriorated beam quality due to multimode behavior, diffraction of light and self-focusing. Quantum cascade lasers presenting high performances in terms of power and heat-load dissipation are reported and their response to a nonlinear control based on optical feedback is studied. Applying optical feedback enables to efficiently tailor its near-field beam profile. The different cavity modes are sequentially excited by shifting the feedback mirror angle. Further control of the near-field profile is demonstrated using spatial filtering. The impact of an inhomogeneous gain as well as the influence of the cavity width are investigated. Compared to existing technologies, that are complex and costly, beam shaping with optical feedback is a more flexible solution to obtain high-quality mid-infrared sources.
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Dates and versions

hal-04687159 , version 1 (04-09-2024)

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Simon Ferré, Louise Jumpertz, Mathieu Carras, Robson Ferreira, Frédéric Grillot. Beam shaping in high-power broad-area quantum cascade lasers using optical feedback. Scientific Reports, 2017, 7 (1), ⟨10.1038/srep44284⟩. ⟨hal-04687159⟩
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