Bend insensitive optical fiber with ultralow bending loss in the visible wavelength band.

@article{Watekar2009BendIO,
  title={Bend insensitive optical fiber with ultralow bending loss in the visible wavelength band.},
  author={Pramod Watekar and Seongmin Ju and Won-Taek Han},
  journal={Optics letters},
  year={2009},
  volume={34 24},
  pages={3830-2}
}
We report experimental development of a single-mode optical fiber optimized for a wavelength band of 400 nm to 700 nm, which showed negligible bending loss of 0.09 dB/loop at 400 nm and 0.23 dB/loop at 633 nm for a loop diameter of 10 mm.