@article{CTT100459830,
  author = {Toru Miura and Fumio Koyama and Yasuhiko Aoki and Akihiro Matsutani and Kenichi Iga},
  title = {Hollow optical waveguide for temperature-insensitive photonic integrated circuits},
  journal = {Jpn. J. Appl. Phys.},
  year = 2001,
}