High-power optically pumped VECSEL using a double-well resonant periodic gain structure

Li Fan, Jörg Hader, Marc Schillgalies, Mahmoud Fallahi, Aramais R. Zakharian, Jerome V. Moloney, Robert Bedford, James T. Murray, Stephan W. Koch, Wolfgang Stolz

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


We present the design and fabrication of an optically pumped vertical-external-cavity surface-emitting lasers with double-well resonant periodic gain structure. Each double-well consists of two 4-nm-thick InGaAs strained quantum wells. The double-well provides optimum overlap between the quantum wells and the antinodes of the standing wave of laser signal at high-power and high-temperature operation. The structure is more tolerant to variation of the growth, processing, and operating temperature for maintaining high modal gain. For a 230-μm diameter pump spot, over 4-W continuous-wave output with a slope efficiency of 39% is demonstrated at 30 °C without thermal rollover.

Original languageEnglish (US)
Pages (from-to)1764-1766
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number9
StatePublished - Sep 2005


  • Double-quantum-well
  • High-power laser
  • InGaAs
  • Optical pumping
  • Resonant periodic gain (RPG)
  • Semiconductor laser
  • Vertical-external-cavity surface-emitting laser (VECSEL)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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