title: Widely tunable six-section semiconductor laser based on etched slots.
abstract: A six section widely tunable laser based on slots etched into the waveguide is presented. This laser is re-growth free which makes it suitable for photonics integration. To improve the laser performance, the front and the back facets are anti- reflection (AR) coated and the laser is integrated with a semiconductor optical amplifier. A tuning range of 55nm covering 12 supermodes with side mode suppression ratio (SMSR) >30dB is reported for the fabricated device using the Vernier tuning effect. This laser platform requires very simple fabrication compared with more complex superstructure gratings.
authors.forename: Marta
authors.initials: M
authors.lastname: Nawrocka
authors.forename: Qiaoyin
authors.initials: Q
authors.lastname: Lu
authors.forename: Wei-Hua
authors.initials: WH
authors.lastname: Guo
authors.forename: Azat
authors.initials: A
authors.lastname: Abdullaev
authors.forename: Frank
authors.initials: F
authors.lastname: Bello
authors.forename: James
authors.initials: J
authors.lastname: O'Callaghan
authors.forename: Thomas
authors.initials: T
authors.lastname: Cathcart
authors.forename: John F
authors.initials: JF
authors.lastname: Donegan