title: High-power thulium lasers on a silicon photonics platform.
abstract: Mid-infrared laser sources are of great interest for various applications, including light detection and ranging, spectroscopy, communication, trace-gas detection, and medical sensing. Silicon photonics is a promising platform that enables these applications to be integrated on a single chip with low cost and compact size. Silicon-based high-power lasers have been demonstrated at 1.55 μm wavelength, while in the 2 μm region, to the best of our knowledge, high-power, high-efficiency, and monolithic light sources have been minimally investigated. In this Letter, we report on high-power CMOS-compatible thulium-doped distributed feedback and distributed Bragg reflector lasers with single-mode output powers up to 267 and 387 mW, and slope efficiencies of 14% and 23%, respectively. More than 70 dB side-mode suppression ratio is achieved for both lasers. This work extends the applicability of silicon photonic microsystems in the 2 μm region.
authors.forename: Nanxi
authors.initials: N
authors.lastname: Li
authors.forename: P
authors.initials: P
authors.lastname: Purnawirman
authors.forename: Zhan
authors.initials: Z
authors.lastname: Su
authors.forename: E
authors.initials: E
authors.lastname: Salih Magden
authors.forename: Patrick T
authors.initials: PT
authors.lastname: Callahan
authors.forename: Katia
authors.initials: K
authors.lastname: Shtyrkova
authors.forename: Ming
authors.initials: M
authors.lastname: Xin
authors.forename: Alfonso
authors.initials: A
authors.lastname: Ruocco
authors.forename: Christopher
authors.initials: C
authors.lastname: Baiocco
authors.forename: Erich P
authors.initials: EP
authors.lastname: Ippen
authors.forename: Franz X
authors.initials: FX
authors.lastname: Kärtner
authors.forename: Jonathan D B
authors.initials: JD
authors.lastname: Bradley
authors.forename: Diedrik
authors.initials: D
authors.lastname: Vermeulen
authors.forename: Michael R
authors.initials: MR
authors.lastname: Watts