title: Tri-channel single-mode terahertz quantum cascade laser.
abstract: We report on a compact THz quantum cascade laser source emitting at, individually controllable, three different wavelengths (92.6, 93.9, and 95.1 μm). This multiwavelength laser array can be used as a prototype of the emission source of THz wavelength division multiplex (WDM) wireless communication system. The source consists of three tapered single-mode distributed feedback (DFB) terahertz quantum cascade lasers fabricated monolithically on a single chip. All array elements feature longitudinal as well as lateral single-mode in the entire injection range. The peak output powers of individual lasers are 42, 73, and 37 mW at 10 K, respectively.
authors.forename: Tao
authors.initials: T
authors.lastname: Wang
authors.forename: Jun-Qi
authors.initials: JQ
authors.lastname: Liu
authors.forename: Feng-Qi
authors.initials: FQ
authors.lastname: Liu
authors.forename: Li-Jun
authors.initials: LJ
authors.lastname: Wang
authors.forename: Jin-Chuan
authors.initials: JC
authors.lastname: Zhang
authors.forename: Zhan-Guo
authors.initials: ZG
authors.lastname: Wang