title: High-power quantum-dot tapered tunable external-cavity lasers based on chirped and unchirped structures.
abstract: A high-power tunable external cavity laser configuration with a tapered quantum-dot semiconductor optical amplifier at its core is presented, enabling a record output power for a broadly tunable semiconductor laser source in the 1.2 - 1.3 µm spectral region. Two distinct optical amplifiers are investigated, using either chirped or unchirped quantum-dot structures, and their merits are compared, considering the combination of tunability and high output power generation. At 1230 nm, the chirped quantum-dot laser achieved a maximum power of 0.62 W and demonstrated nearly 100-nm tunability. The unchirped laser enabled a tunability range of 32 nm and at 1254 nm generated a maximum power of 0.97 W, representing a 22-fold increase in output power compared with similar narrow-ridge external-cavity lasers at the same current density.
authors.forename: Stephanie
authors.initials: S
authors.lastname: Haggett
authors.forename: Michel
authors.initials: M
authors.lastname: Krakowski
authors.forename: Ivo
authors.initials: I
authors.lastname: Montrosset
authors.forename: Maria Ana
authors.initials: MA
authors.lastname: Cataluna
mesh_terms: D000669:Amplifiers, Electronic; D004867:Equipment Design; D054023:Lasers, Semiconductor; D008027:Light; D045663:Quantum Dots; D012666:Semiconductors