@article{oai:oist.repo.nii.ac.jp:00000849,
 author = {Kasumie, Sho and Yang, Yong and Ward, Jonahan M. and Nic Chormaic, Sile},
 issue = {2},
 journal = {The Review of Laser Engineering},
 month = {Feb},
 note = {Optical frequency combs are widely used for metrology, optical clocks, optical communications and sensors. In whispering gallery mode (WGM) microcavity resonators, geometrical features enable the four-wave mixing phase match condition to be satisfied. Hence, frequency comb generation is achievable. Geometrical dispersion of hollow structure WGM cavities can broaden the comb span to the visible range.},
 pages = {92--96},
 title = {Towards visible frequency comb generation using a hollow WGM resonator},
 volume = {46},
 year = {2018}
}