Frequency-tunable ultrashort pulse VECSEL sources

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


Quantum well femtosecond pulse VECSELs are ideally suited to generate pulse trains at GHz repetition frequencies. Here I will report on recent progress in developing laser systems which exploit the unique features of the VECSEL, such as 'class A' dynamics and the short upper level lifetime of the gain. Continuous tunable repetition rate operation through cavity length variation, covering the range 2.8 to 7.9 GHz is described. Pulses as short as 290 fs were achieved with femtosecond pulse operation between 2.8 and 5 GHz. To increase the repetition rate further, into the hundreds of GHz range, harmonic mode locking is investigated. We demonstrated 400 fs pulses at 175 GHz repetition frequency with a combined average output power of 300 mW.

Original languageEnglish
Title of host publicationVertical External Cavity Surface Emitting Lasers (VECSELs) II
Number of pages6
Publication statusPublished - 14 Feb 2012
EventVertical External Cavity Surface Emitting Lasers (VECSELs) II - San Francisco, CA, United States
Duration: 23 Jan 201224 Jan 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


ConferenceVertical External Cavity Surface Emitting Lasers (VECSELs) II
Country/TerritoryUnited States
CitySan Francisco, CA


  • Harmonic mode locking
  • Mode-locked
  • Repetition frequency
  • Semiconductor disk laser

ASJC Scopus subject areas

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


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