Record Low Loss Hollow Core Fiber for the 1 micron region

Record Low Loss Hollow Core Fiber for the 1 micron region

Hesham Sakr presented this record breaking result at CLEO Munich last week. The team made a NANF fibre to guide high power laser light in the 1µm region which demonstrates the lowest loss of any hollow core fibre at this wavelength.

The NANF fibre (left) as seen under a microscope, (right) the experimental modefield.

We report the fabrication of a 439 m length of Nested Antiresonant Nodeless Hollow-Core fibre (NANF) for the 1 µm wavelength region. This is useful for applications such as high peak power delivery. The fabricated NANF shows a record low loss of 2.53 dB/km at 1100 nm and 2.78 dB/km at 1070 nm. Whilst these results are extremely encouraging we believe they leave a significant margin for further improvements both in fiber yield and loss values.

H. Sakr, G. T. Jasion, T. D. Bradley, Y. Chen, J. R. Hayes, I. A. Davidson, H-C. Mulvad, L. Xu, D. J. Richardson, and F. Poletti, “Record Low Loss Hollow Core Fiber for the 1μm region”, CLEO Munich 2019