Optical characteristics of VCSEL pumped microchip lasers

Jian Wu, Gheorghe Iordache, Huw D. Summers, John S. Roberts

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


Vertical-cavity surface-emitting lasers (VCSELs) have been used to optically pump a planar-cavity, Nd:YVO4 microchip laser. Lasing was achieved with a minimum pump power of 0.8 mW from a 10 μm diameter, circular aperture VCSEL. The microchip laser operates in a fundamental Gaussian mode of 40-50 μm diameter for a range of pump sizes from 10 to 50 μm with a threshold pump power proportional to the pump size. These characteristics indicate that the mode formation is controlled by gain-induced refractive index changes within a cavity that is positively detuned from the atomic resonance. Stable, Gaussian mode formation is also achieved when directly pumping the microchip lasers with no intervening optics.

Original languageEnglish (US)
Pages (from-to)251-256
Number of pages6
JournalOptics Communications
Issue number1-6
StatePublished - Sep 1 2001


  • Laser diodes
  • Semiconducting III-V materials
  • Solid state lasers
  • Vanadates

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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