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We compare two types of optical parametric oscillators (OPO's) with LBO and KTP crystals, pumped with a frequency doubled Q-switched Nd:YAG laser. The threshold pump power density near degeneracy was found to be 29 MW/cm2 for the pulsed doubly resonant oscillator (DRO) with LBO, and 5.7 MW/cm2 for the DRO with KTP. The DRO was continuously tuned in the near infrared by rotation of LBO and KTP crystals. The full width at half-maximum (FWHM) linewidth of the signal radiation emitted by DRO-LBO at 998 was 10 nm, and 0.65 nm for DRO-KTP at 1052.6 nm.
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Tom
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115--126
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Bibliogr. 21 poz., 10 rys.
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- National Institute for Laser, Plasma and Radiation Physic, Laser Department, P.O. Box MG 36, Bucharest 76900, Romania.
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bwmeta1.element.baztech-article-BPW3-0001-0096