Efficient, high-repetition rate, blue source using a compact CR:LiSAF laser

B. Agate, A. Kemp, C.T.A. Brown, U. Keller, W. Sibbett

Research output: Chapter in Book/Report/Conference proceedingChapter


Summary form only given. We report a compact, directly diode-pumped Cr:LiSAF laser as an alternative pump source. This laser has an electrical-to-optical efficiency in excess of 1% and produces transform-limited pulses of ∼150 fs in duration at ∼865 nm. The average power is 35 mW and the repetition rate is ∼250 MHz, which implies modest peak powers of less than 1 kW. At these low power levels, efficient frequency doubling usually requires complex arrangements, especially if the pulse duration is to be preserved. In this paper we describe the use of a relatively thick doubling crystal in a single-pass, extra-cavity arrangement. Although the second harmonic pulses suffer temporal broadening, this represents an effective way to achieve efficient frequency conversion in a simplified configuration. The nonlinear crystal was potassium niobate (KNbO3) cut for non-critical phase matching at 860 nm and 22°C.
Original languageEnglish
Title of host publicationLasers and Electro-Optics, 2002. CLEO '02. Technical Digest. Summaries of Papers Presented at the
Number of pages1
Publication statusPublished - 2002


  • chromium
  • lithium compounds
  • optical harmonic generation
  • potassium compounds
  • solid lasers
  • strontium compounds
  • average power
  • compact Cr
  • LiSAF laser
  • directly diode-pumped Cr
  • efficient frequency conversion
  • efficient high-repetition rate blue source
  • electrical-to-optical efficiency
  • frequency doubling
  • low power levels
  • noncritical phase matching
  • nonlinear crystal
  • peak powers
  • pump source
  • relatively thick doubling crystal
  • repetition rate
  • second harmonic pulses
  • single-pass extra-cavity arrangement
  • temporal broadening
  • transform-limited pulses
  • KNbO3
  • LiSrAlF6
  • Cr


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