GaAs-chip-based mid-infrared supercontinuum generation

Geoffroy Granger; Myriam Bailly; Hugo Delahaye; Cristian Jimenez; Idris Tiliouine; Yann Leventoux; Jean-Christophe Orlianges; Vincent Couderc; Bruno Gérard; Rezki Becheker; Said Idlahcen; Thomas Godin; Ammar Hideur; Arnaud Grisard; Eric Lallier; Sébastien Février

doi:10.1038/s41377-023-01299-9

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GaAs-chip-based mid-infrared supercontinuum generation

Original Articles

- GaAs-chip-based mid-infrared supercontinuum generation
- Light: Science & Applications Vol. 12, Issue 11, Pages: 2443-2450(2023)
- Affiliations：
  
  1.Université de Limoges XLIM UMR CNRS 7252, 123 Av. A. Thomas, 87060 Limoges, France
  2.Thales Research & Technology, 1 Av. Augustin Fresnel, 91767 Palaiseau Cedex, France
  3.III-V Lab, 1 Av. Augustin Fresnel, 91767 Palaiseau Cedex, France
  4.CORIA (UMR 6614), CNRS-INSA Rouen-Université de Rouen Normandie, Normandie Université, Saint-Etienne du Rouvray, France
- Author bio：
  
  Sébastien Février (sebastien.fevrier@unilim.fr)
- Funds：
- DOI：10.1038/s41377-023-01299-9
  CLC：
- Published：30 November 2023，
  
  Published Online：18 October 2023，
  
  Received：14 February 2023，
  
  Revised：11 September 2023，
  
  Accepted：06 October 2023
- Accepted：
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Granger, G. et al. GaAs-chip-based mid-infrared supercontinuum generation. Light: Science & Applications, 12, 2443-2450 (2023).
DOI：

Granger, G. et al. GaAs-chip-based mid-infrared supercontinuum generation. Light: Science & Applications, 12, 2443-2450 (2023). DOI： 10.1038/s41377-023-01299-9.

摘要

Abstract

The mid-infrared spectral region opens up new possibilities for applications such as molecular spectroscopy with high spatial and frequency resolution. For example

the mid-infrared light provided by synchrotron sources has helped for early diagnosis of several pathologies. However

alternative light sources at the table-top scale would enable better access to these state-of-the-art characterizations

eventually speeding up research in biology and medicine. Mid-infrared supercontinuum generation in highly nonlinear waveguides pumped by compact fiber lasers represents an appealing alternative to synchrotrons. Here

we introduce orientation-patterned gallium arsenide waveguides as a new versatile platform for mid-infrared supercontinuum generation. Waveguides and fiber-based pump lasers are optimized in tandem to allow for the group velocities of the signal and the idler waves to match near the degeneracy point. This configuration exacerbates supercontinuum generation from 4 to 9 µm when waveguides are pumped at 2750 nm with few-nanojoule energy pulses. The brightness of the novel mid-infrared source exceeds that of the third-generation synchrotron source by a factor of 20. We also show that the nonlinear dynamics is strongly influenced by the choice of waveguide and laser parameters

thus offering an additional degree of freedom in tailoring the spectral profile of the generated light. Such an approach then opens new paths for high-brightness mid-infrared laser sources development for high-resolution spectroscopy and imaging. Furthermore

thanks to the excellent mechanical and thermal properties of the waveguide material

further power scaling seems feasible

allowing for the generation of watt-level ultra-broad frequency combs in the mid-infrared.

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references

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