Ultrafast in-situ probing of passively mode-locked VECSEL dynamics

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

While Vertical-External-Cavity-Surface-Emitting-Lasers (VECSELs) have been successfully used as ultrafast laser sources with pulse durations in the hundreds of femtosecond regime, the dynamics within the semiconductor gain structure are not yet completely understood. With the high carrier densities inside the semiconductor, nonequilibrium effects such as kinetic-hole burning are expected to play a major role in pulse formation dynamics. Moreover, the nonlinear phase change by the intense light field can induce a complex dispersion, which may potentially limit the achievable pulse durations. To shed light on such nonequilibrium dynamics, we perform in-situ characterization of mode-locked VECSELs. We probe the gain media as well as the intracavity absorber with a femtosecond fiber laser source. For measuring temporal characteristics, we employ an asynchronous optical sampling technique by phase-locking the repetition rate of the VECSEL to a multiple of the probe laser with an adjustable offset frequency. This allows for probing dynamics from femtosecond to nanosecond time scales with scan rates up to hundreds of Hertz without compromise of measurement precision which can be introduced by mechanical delays covering such large temporal windows. With a resolution in the femtosecond range, we characterize gain depletion by the intracavity pulse as well as the gain recovery timescales for different power levels and operation regimes.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSPIE
Volume9349
ISBN (Print)9781628414394
DOIs
StatePublished - 2015
EventVertical External Cavity Surface Emitting Lasers (VECSELs) V - San Francisco, United States
Duration: Feb 9 2015Feb 10 2015

Other

OtherVertical External Cavity Surface Emitting Lasers (VECSELs) V
CountryUnited States
CitySan Francisco
Period2/9/152/10/15

Fingerprint

External Cavity
Surface emitting lasers
Laser modes
surface emitting lasers
Femtosecond
Vertical
Laser
cavities
Semiconductors
pulse duration
Time Scales
Probe
Semiconductor materials
Ultrafast Lasers
Frequency Offset
Nonequilibrium Dynamics
Ultrafast lasers
Phase Locking
Femtosecond Laser
probes

Keywords

  • femtosecond
  • intracavity
  • mode-locking
  • SESAM
  • VECSEL

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Scheller, M. A., Baker, C. W., Gbele, K., Koch, S. W., Jones, R. J., & Moloney, J. V. (2015). Ultrafast in-situ probing of passively mode-locked VECSEL dynamics. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 9349). [93490H] SPIE. https://doi.org/10.1117/12.2080186

Ultrafast in-situ probing of passively mode-locked VECSEL dynamics. / Scheller, Maik A; Baker, Caleb W.; Gbele, Kokou; Koch, Stephan W; Jones, Ronald J; Moloney, Jerome V.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 9349 SPIE, 2015. 93490H.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Scheller, MA, Baker, CW, Gbele, K, Koch, SW, Jones, RJ & Moloney, JV 2015, Ultrafast in-situ probing of passively mode-locked VECSEL dynamics. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 9349, 93490H, SPIE, Vertical External Cavity Surface Emitting Lasers (VECSELs) V, San Francisco, United States, 2/9/15. https://doi.org/10.1117/12.2080186
Scheller MA, Baker CW, Gbele K, Koch SW, Jones RJ, Moloney JV. Ultrafast in-situ probing of passively mode-locked VECSEL dynamics. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 9349. SPIE. 2015. 93490H https://doi.org/10.1117/12.2080186
Scheller, Maik A ; Baker, Caleb W. ; Gbele, Kokou ; Koch, Stephan W ; Jones, Ronald J ; Moloney, Jerome V. / Ultrafast in-situ probing of passively mode-locked VECSEL dynamics. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 9349 SPIE, 2015.
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