title: Promising compact wavelength-tunable optical add-drop multiplexer in dense wavelength-division multiplexing systems.
abstract: We design and model a highly compact and tunable optical add-drop multiplexer (OADM) device that consists of long-period gratings and piezoelectric ceramic fiber stretchers. The proposed OADM shows that 50 dense wavelength-division multiplexing channel signals can be selected in the wavelength range from 1526.25 to 1563.75 nm with 0.75-nm channel spacing, which covers the whole C-band gain spectrum of an erbium-doped fiber amplifier. The cross talk between channels is less than -39 dB, and the total insertion loss of the device is approximately 0.24 dB, which includes the splicing losses, the mode mismatching loss, and the expected losses in the two side-by-side coupled fibers.
authors.affiliation: Network Technology Research Center, Nanyang Technological University, 50 Nanyang Drive, Research TechnoPlaza, Singapore 637553. eynzhu@ntu.edu.sg
authors.forename: Yinian
authors.initials: Y
authors.lastname: Zhu
authors.forename: Ping
authors.initials: P
authors.lastname: Shum
authors.forename: Chao
authors.initials: C
authors.lastname: Lu
authors.forename: Pieter L
authors.initials: PL
authors.lastname: Swart
authors.forename: Beatrys M
authors.initials: BM
authors.lastname: Lacquet
authors.forename: Stephanus J
authors.initials: SJ
authors.lastname: Spammer