Temporal and spectral gain dynamics in an actively modelocked semiconductor laser

M. Hofmann, M. Koch, H. J. Heinrich, G. Weiser, J. Feldmann, W. Elsaesser, E. O. Goebel, W. W. Chow, Stephan W Koch

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We apply a new electrical pump, optical probe spectroscopic technique using a fs Ti:sapphire laser to study the temporal and spectral gain dynamics of a modelocked external cavity semiconductor laser. The temporal behaviour of the gain and the spectrum of the differential gain are directly obtained. The spectrum of the differential refractive index is determined via a Kramers-Kronig transformation enabling us to determine the wavelength dependence of the α parameter. From the discussion of these results, strategies, limits and solutions are proposed to improve the quality of modelocking of diode lasers consequently resulting in pulse shortening. The proposals are experimentally verified for wavelength-detuned operation and for synchronous pumping with ultrashort optical pulses instead of electrical modulation.

Original languageEnglish (US)
Pages (from-to)127-132
Number of pages6
JournalIEE Proceedings: Optoelectronics
Volume141
Issue number2
DOIs
StatePublished - Apr 1994
Externally publishedYes

Fingerprint

Semiconductor lasers
semiconductor lasers
Pumping (laser)
Wavelength
Sapphire
Laser pulses
Refractive index
Modulation
Pumps
pulses
wavelengths
proposals
Lasers
sapphire
pumping
refractivity
pumps
modulation
cavities
probes

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics

Cite this

Temporal and spectral gain dynamics in an actively modelocked semiconductor laser. / Hofmann, M.; Koch, M.; Heinrich, H. J.; Weiser, G.; Feldmann, J.; Elsaesser, W.; Goebel, E. O.; Chow, W. W.; Koch, Stephan W.

In: IEE Proceedings: Optoelectronics, Vol. 141, No. 2, 04.1994, p. 127-132.

Research output: Contribution to journalArticle

Hofmann, M, Koch, M, Heinrich, HJ, Weiser, G, Feldmann, J, Elsaesser, W, Goebel, EO, Chow, WW & Koch, SW 1994, 'Temporal and spectral gain dynamics in an actively modelocked semiconductor laser', IEE Proceedings: Optoelectronics, vol. 141, no. 2, pp. 127-132. https://doi.org/10.1049/ip-opt:19949993
Hofmann M, Koch M, Heinrich HJ, Weiser G, Feldmann J, Elsaesser W et al. Temporal and spectral gain dynamics in an actively modelocked semiconductor laser. IEE Proceedings: Optoelectronics. 1994 Apr;141(2):127-132. https://doi.org/10.1049/ip-opt:19949993
Hofmann, M. ; Koch, M. ; Heinrich, H. J. ; Weiser, G. ; Feldmann, J. ; Elsaesser, W. ; Goebel, E. O. ; Chow, W. W. ; Koch, Stephan W. / Temporal and spectral gain dynamics in an actively modelocked semiconductor laser. In: IEE Proceedings: Optoelectronics. 1994 ; Vol. 141, No. 2. pp. 127-132.
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