title: Long-period gratings inscribed in photonic crystal fiber by symmetric CO(2) laser irradiation: erratum.
abstract: This erratum amends the wrongly cited NSF grant number in acknowledgment section in our publication.
authors.forename: Fei
authors.initials: F
authors.lastname: Tian
authors.forename: Jiri
authors.initials: J
authors.lastname: Kanka
authors.forename: Bing
authors.initials: B
authors.lastname: Zou
authors.forename: Kin Seng
authors.initials: KS
authors.lastname: Chiang
authors.forename: Henry
authors.initials: H
authors.lastname: Du