TY - JOUR TI - Tunable master-oscillator power-amplifier based on chirped quantum-dot structures AU - Ding, Y. AU - Alhazime, A. AU - Nikitichev, D. AU - Fedorova, K. AU - Ruiz, M. AU - Tran, M. AU - Robert, Y. AU - Kapsalis, A. AU - Simos, H. AU - Mesaritakis, C. AU - Xu, T. AU - Bardella, P. AU - Rossetti, M. AU - Krestnikov, I. AU - Livshits, D. AU - Montrosset, I. AU - Syvridis, D. AU - Cataluna, M.A. AU - Krakowski, M. AU - Rafailov, E. JO - IEEE Photonics Technology Letters PY - 2012 VL - 24 TODO - 20 SP - 1841-1844 PB - SN - 1041-1135 TODO - 10.1109/LPT.2012.2216516 TODO - External cavity; master-oscillator power-amplifier; Mode-locked; Modelocking; Optical pulse sources; Output peak power; Passively mode-locked lasers; Picoseconds; Quantum dot structure; Semiconductor amplifiers; Tunabilities, Lasers; Passive mode locking; Power spectral density; Semiconductor quantum dots, Saturable absorbers TODO - A broadly tunable master-oscillator power-amplifier (MOPA) picosecond optical pulse source is demonstrated, consisting of an external cavity passively mode-locked laser diode with a tapered semiconductor amplifier. By employing chirped quantum-dot structures on both the oscillator's gain chip and amplifier, a wide tunability range between 1187 and 1283 nm is achieved. Under mode-locked operation, the highest output peak power of 4.39 W is achieved from the MOPA, corresponding to a peak power spectral density of 31.4 dBm/nm. © 1989-2012 IEEE. ER -