Passively mode-locked 1 GHz MOPA system generating sub-500-fs pulses after external compression
T. Ulma, F. Hartha, A. Klehrb, G. Erbertb and J. L’huilliera
Published in:
Proc. SPIE, vol. 8432, no. 84320Y (2012).
Abstract:
We compared the performance of DQW and TQW edge-emitters in a passively mode-locked 1GHz MOPA system at 1075 nm wavelength. Passive mode-locking is induced by applying a reverse DC voltage to the absorber section. The average power is increased up to 0.9W by a single-stripe pre-amplifier and a tapered amplifier. After compensation of the quadratic chirp in a grating compressor we achieved a pulse duration of 342 fs. We found that the oscillator gain current and the absorber bias voltage have significant impact on the pulse duration. Both parameters were used to optimize the MOPA system with respect to the shortest pulse length after compression.
a Photonik-Zentrum Kaiserslautern, Kohlenhofstr. 10, 67663 Kaiserslautern, Germany
b Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, D-12489 Berlin, Germany
Keywords:
Diode lasers, quantum well lasers, mode-locking, femtosecond pulses, pulse compression.
© 2012 COPYRIGHT SPIE--The International Society for Optical Engineering. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the SPIE.
Full version in pdf-format.