A Bessel beam pumped periodically poled lithium niobate optical parametric oscillator has been characterized. A slope efficiency of 5.4±01% was obtained and a threshold pulse energy of 472±12μJ was measured, which corresponds to a threshold fluence of 0.207 ± 0.005 J cm-2. The signal output was tuned over ∼20 nm by changing the crystal temperature by 50°C. The FWHM bandwidth at each temperature was observed to be 0.3 ± 0.1 nm at each wavelength. The beam profiles of the Bessel pump and Gaussian signal beams were studied in both the near and far field. A beam divergence of 1.14 ± 0.02 mrad was measured. © 2000 Taylor & Francis Ltd.
|Number of pages||7|
|Journal||JOURNAL OF MODERN OPTICS|
|Publication status||Published - 15 Sep 2000|