title: Comb filter with independently tunable wavelength spacing and bandwidth using cascaded variable differential group delay elements.
abstract: An all-optical comb filter with independently tunable wavelength spacing and bandwidth (BW) is proposed. Using three cascaded variable differential-group-delay elements, we demonstrate theoretically and experimentally the tunability of the comb filter with >10 dB sidelobe reduction by adjusting three elements. The wavelength spacing is determined by the first filter module, while the sidelobe suppression ratio and the BW are defined by the middle and the last one, respectively.
authors.affiliation: Center for Information Photonics & Communications, School of Information Science & Technology, Southwest Jiaotong University, Chengdu, Sichuan 610031, China.
authors.forename: H-Y
authors.initials: HY
authors.lastname: Jiang
authors.forename: L-S
authors.initials: LS
authors.lastname: Yan
authors.forename: J
authors.initials: J
authors.lastname: Ye
authors.forename: W
authors.initials: W
authors.lastname: Pan
authors.forename: B
authors.initials: B
authors.lastname: Luo
authors.forename: X Steve
authors.initials: XS
authors.lastname: Yao