Picosecond gain dynamics of an actively mode-locked external-cavity laser diode

M. Hofmann, M. Koch, J. Feldmann, W. Elsasser, E. O. Gobel, Stephan W Koch, S. W. Koch

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We report a new experimental approach to study the temporal gain dynamics of an actively mode-locked external-cavity laser diode. The experiment can be viewed as an electrical pump-optical probe technique. Picosecond time resolution is achieved by synchronizing the actively mode-locked semiconductor laser to a mode-locked Ti:sapphire laser. The transmission of the Ti:sapphire pulses through the active region of the laser diode is then measured as a function of photon energy and delay time. Our experiment allows to investigate the dynamics of the entire gain spectrum with picosecond time resolution since the Ti:sapphire laser is wavelength tunable. On the basis of these data we are able to determine directly the wavelength dependence of the differential gain. The results compare well with microscopic calculations. The implication for the mode-locking behavior of the diode laser is discussed.

Original languageEnglish (US)
Pages (from-to)1756-1762
Number of pages7
JournalIEEE Journal of Quantum Electronics
Volume30
Issue number8
DOIs
StatePublished - Aug 1994
Externally publishedYes

Fingerprint

Semiconductor lasers
semiconductor lasers
Sapphire
sapphire
cavities
Wavelength
Laser mode locking
Lasers
Laser modes
wavelengths
locking
lasers
Laser pulses
Time delay
time lag
Photons
Experiments
Pumps
pumps
probes

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

Cite this

Hofmann, M., Koch, M., Feldmann, J., Elsasser, W., Gobel, E. O., Koch, S. W., & Koch, S. W. (1994). Picosecond gain dynamics of an actively mode-locked external-cavity laser diode. IEEE Journal of Quantum Electronics, 30(8), 1756-1762. https://doi.org/10.1109/3.301639

Picosecond gain dynamics of an actively mode-locked external-cavity laser diode. / Hofmann, M.; Koch, M.; Feldmann, J.; Elsasser, W.; Gobel, E. O.; Koch, Stephan W; Koch, S. W.

In: IEEE Journal of Quantum Electronics, Vol. 30, No. 8, 08.1994, p. 1756-1762.

Research output: Contribution to journalArticle

Hofmann, M, Koch, M, Feldmann, J, Elsasser, W, Gobel, EO, Koch, SW & Koch, SW 1994, 'Picosecond gain dynamics of an actively mode-locked external-cavity laser diode', IEEE Journal of Quantum Electronics, vol. 30, no. 8, pp. 1756-1762. https://doi.org/10.1109/3.301639
Hofmann, M. ; Koch, M. ; Feldmann, J. ; Elsasser, W. ; Gobel, E. O. ; Koch, Stephan W ; Koch, S. W. / Picosecond gain dynamics of an actively mode-locked external-cavity laser diode. In: IEEE Journal of Quantum Electronics. 1994 ; Vol. 30, No. 8. pp. 1756-1762.
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