Ultralow-pump-threshold, femtosecond CR31+:LiSrAlF6 laser pumped by a single narrow-stripe AlGaInP laser diode

G.J. Valentine, J.M. Hopkins, P. LozaAlvarez, G.T. Kennedy, W. Sibbett, D. Burns, A. Valster

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We report what we believe to be the first demonstration of a Kerr-lens mode-locked Cr31:LiSrAlF6 laser that is pumped by a single narrow-stripe AlGaInP laser diode with a diffraction-limited output beam. A novel low-loss three-mirror laser cavity design is described in which strong, localized Kerr lensing was exploited such that 75-fs-duration pulses were obtained for only 36 mW of incident pump power. This pump power was maintained for 18 h by just three AA batteries as the electrical power source. We have shown that mode locking can be sustained for pump powers as low as 22 mW.
Original languageEnglish
Pages (from-to)1639-1641
Number of pages2
JournalOptics Letters
Issue number21
Publication statusPublished - 1 Nov 1997


  • ultralow-pump-threshold
  • femtosecond cr3+
  • lisralf6 laser
  • single narrow-stripe
  • AlGaInP laser diode

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