Strengthening of poly-crystalline (ceramic) Nd:YAG elements for high-power laser applications

Revital Feldman, Yuval Golan, Zeev Burshtein, Steven Jackel, Inon Moshe, Avi Meir, Yaakov Lumer, Yehoshua Shimony

Research output: Contribution to journalArticlepeer-review

Abstract

In the last decade, poly-crystalline (ceramic) Nd:YAG components emerged as very promising candidates for high-power lasers, exhibiting some advantages over single-crystal Nd:YAG ones. Such devices are required to endure high thermal stress during operation. In our present work we present experimental results on the strengthening of poly-crystalline YAG and Nd:YAG fine-ground components by chemical etching in hot ortho-phosphoric acid. The strength of poly-crystalline Nd:YAG laser rods was measured inside a laser head by applying the pump power till rod fracture. A factor of ∼3 increase in the fracture longitudinal heat power density for etched poly-crystalline Nd:YAG rods as compared to standard commercial poly-crystalline rods was obtained. This effect is similar to our previous results on single-crystal Nd:YAG laser rods which showed a factor of 3.6-5.0 increase in tensile strength by the same treatment. A modified Weibull analysis was used to assess the fracture probability parameters.

Original languageAmerican English
Pages (from-to)695-701
Number of pages7
JournalOptical Materials
Volume33
Issue number5
DOIs
StatePublished - 1 Jan 2011

Keywords

  • Laser ceramics
  • Mechanical properties
  • Poly-crystalline
  • Weibull analysis
  • Yag

All Science Journal Classification (ASJC) codes

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

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