Title :
Nonlinear absorption and carrier dynamics in slab-coupled optical waveguide amplifiers
Author :
Motamedi, Ali R. ; Ippen, Erich P. ; Plant, Jason J. ; Donnelly, Joseph P. ; Juodawlkis, Paul W.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Massachusetts Inst. of Technol., Cambridge, MA, USA
Abstract :
Limitations imposed on the saturation energy of high-power slab-coupled optical waveguide amplifiers were studied for pulsed signal transmission. Loss due to the two-photon absorption and free-carrier absorption processes becomes a dominant factor for ultrashort-pulse amplification, leading to lower saturation energy. TPA and FCA coefficients are measured to be 65 cm/GW and 7times10-17 cm2, respectively. Carrier-related gain recovery times vary from 160 ps to 380 ps at bias currents from 4 A to 1 A, respectively.
Keywords :
III-V semiconductors; gallium arsenide; gallium compounds; high-speed optical techniques; indium compounds; optical saturable absorption; optical waveguides; two-photon processes; FCA; InGaAs-InP; TPA; carrier dynamics; free-carrier absorption; gain recovery times; nonlinear absorption; optical waveguide amplifiers; saturation energy; two-photon absorption; ultrashort-pulse amplification; Absorption; High power amplifiers; Nonlinear optics; Optical amplifiers; Optical pulses; Optical saturation; Optical waveguides; Pulse amplifiers; Semiconductor optical amplifiers; Stimulated emission; (320.0320) Ultrafast optics; (320.7100) Ultrafast measurements; (320.7110) ultrafast nonlinear optics;
Conference_Titel :
Lasers and Electro-Optics, 2009 and 2009 Conference on Quantum electronics and Laser Science Conference. CLEO/QELS 2009. Conference on
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-55752-869-8
Electronic_ISBN :
978-1-55752-869-8
