Gas fiber lasers may represent a breakthrough in creating powerful radiation sources in the mid-IR

Pryamikov, Andrey D.

doi:10.1038/s41377-022-00728-5

Cited by 8 publications

(2 citation statements)

References 23 publications

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“…More importantly, the HCF exhibits a limited degree of overlapping mode eld with the silica material, resulting in signi cantly reduced losses compared to bulk silica. This exceptional nature makes HCF dramatically attractive in the MIR band 23 .…”

Section: Introductionmentioning

confidence: 99%

4.8-μm CO-filled hollow-core silica fibre laser

wang,

Li,

Yang

et al. 2024

Preprint

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Mid-infrared (MIR) fibre lasers are important for a wide range of applications in sensing, spectroscopy, imaging, defense, and security. Some progress has been made in the research of MIR fibre lasers based on soft glass fibres, however, the emission range of rare-earth ions and the robustness of the host materials are still a major challenge for MIR fibre lasers. The large number of gases provide a variety of optical transitions in the MIR band. When combined with recent advances in low-loss hollow-core fibre (HCF), there is a great opportunity for gas-filled fibre lasers to further extend the radiation to the MIR region. Here, a 4.8-µm CO-filled silica-based HCF laser is reported for the first time. This is enabled by a homemade broadband low-loss HCF with a measured loss of 1.81 dB/m at 4.8 µm. A maximum MIR output power of 46 mW and a tuning range of 180 nm (from 4644 to 4824 nm) are obtained by using an advanced 2.33-µm narrow-linewidth fibre laser. This demonstration represents the longest-wavelength silica-based fibre laser to date, while the absorption loss of bulk silica at 4824 nm is up to 13, 000 dB/m. Further wavelength expansion could be achieved simply by changing the pump absorption line. This work paves the way for the MIR silica fibre laser beyond 5 µm.

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Section: Introductionmentioning

confidence: 99%

4.8-μm CO-filled hollow-core silica fibre laser

wang,

Li,

Yang

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…Owing to their simple cladding structure of one-layer circular capillaries with negative curvature of core-cladding boundary enables broader transmission windows divided into several bands from UV to the Mid-infrared and lower overlap of field between light and glass material. Thus, it was proven to have great potential for the delivery of high energy pulses laser and generating continuous wave Mid-infrared laser based fiber gas laser (FGL) system [1][2][3][4]. Although a few meters of HCFs would be enough to be employed in FGL, following the fiber drawing conditions during the fabrication of desired fiber geometry isn't always possible to achieve perfect positions to the transmission bands.…”

Section: Introductionmentioning

confidence: 99%