Passively Q-switched diode-pumped Nd:YAG and Nd:YVO4 using (Cr4+,Ca2+):YAG and (Cr4+,Mg2+):YAG saturable absorbers

Yehoshua Kalisky, Ofra Kalisky, Milan R. Kokta

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


We report the operation of passively Q-switched diode-end-pumped Nd:YAG and Nd:YVO4 lasers by employing Cr4+-doped garnets with Ca2+ or Mg2+ as charge compensators. We found that the laser performance improved significantly, mainly in the Nd:YVO4 system when (Cr4+,Mg2+):YAG sample was used as a passive Q-switching. For example, in the Nd:YVO4 and Nd:YAG lasers, the maximum peak power using (Cr4+,Mg2+):YAG saturable absorber was higher by a factor of 8.5 and 2.6, respectively, relative to (Cr4+,Ca2+):YAG. This fact is attributed to better optical quality of the (Cr4+,Mg2+):YAG sample, as a result of improved dopant distribution and reduced internal stresses inside the saturable absorber crystals. Similar passively Q-switched laser performance can be obtained by using other garnets with an open structure, and hence, with low internal stresses, such as (Cr4+,Ca2+):GGG. We also compared the laser performance of Nd:GdVO4 with the same saturable absorbers and obtained both passive Q-switching and passive mode locking. By using an analytical model with the relevant physical parameters of the laser crystals and saturable absorbers it is possible to optimize the laser performance.

Original languageEnglish
Pages (from-to)1775-1780
Number of pages6
JournalOptical Materials
Issue number11
StatePublished - 1 Jan 2008
Externally publishedYes


  • Diode-pumped lasers
  • Nd-doped vanadate lasers
  • Nd:YAG
  • Saturable absorber

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering


Dive into the research topics of 'Passively Q-switched diode-pumped Nd:YAG and Nd:YVO4 using (Cr4+,Ca2+):YAG and (Cr4+,Mg2+):YAG saturable absorbers'. Together they form a unique fingerprint.

Cite this