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A research group led by Prof. Jiang Haihe from the Hefei Institutes of Â鶹ÒùÔºical Science of the Chinese Academy of Sciences has designed a 6-hole microstructure anti-resonant air-core fiber (AR-HCF) with a larger core diameter of 78 μm.

"This is the first time that 2.79 μm high-energy pulsed laser has been transmitted with good efficiency at room temperature," said Prof. Jiang. The was published in Optics & Laser Technology.

Traditional medical laser devices often face challenges such as complex structures and low efficiency. The AR-HCF overcomes these problems with its simple design, high transmission efficiency, and flexibility.

In this study, the researchers designed a simple structure with high coupling transmission efficiency, high damage threshold, and flexible transmission AR-HCF to replace the light guide arm in laser energy transmission.

With an average coupling transmission efficiency of 77.3% and a maximum of 85%, the optical fiber cable system shows impressive performance.

This innovation enables efficient transmission of high-energy pulsed lasers, particularly in the mid-infrared range, which is critical for medical procedures.