Open AccessGain-switching dynamics in optically pumped single-mode InGaN vertical-cavity surface-emitting lasers
Author(s) -
Shaoqiang Chen,
Akifumi Asahara,
Takashi Ito,
Jiangyong Zhang,
Baoping Zhang,
Tohru Suemoto,
Masahiro Yoshita,
Hidefumi Akiyama
Publication year - 2014
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.004196
Subject(s) - optics , streak camera , laser , materials science , semiconductor laser theory , gain switching , quantum well , optoelectronics , rate equation , pulse (music) , full width at half maximum , physics , quantum mechanics , kinetics , detector
The gain-switching dynamics of single-mode pulses were studied in blue InGaN multiple-quantum-well vertical-cavity surface-emitting lasers (VCSELs) through impulsive optical pumping. We measured the shortest single-mode pulses of 6.0 ps in width with a method of up-conversion, and also obtained the pulse width and the delay time as functions of pump powers from streak-camera measurements. Single-mode rate-equation calculations quantitatively and consistently explained the observed data. The calculations indicated that the pulse width in the present VCSELs was mostly limited by modal gain, and suggested that subpicosecond pulses should be possible within feasible device parameters.