28 April 2008 300-kW eye-safe intracavity OPO transmitter
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We report on a passively Q-switched end pumped Nd:YLF laser including a noncritically phase-matched KTP singly resonant intracavity optical parametric oscillator (IOPO-KTP). For the Q-switching operation we have used Cr:YAG saturable absorber. The optimized passively Q-switched Nd:YLF laser without IOPO generated linearly polarized pulses of 11.5 ns and 1.07 mJ at 1047 nm. The conversion efficiency of the optimized Q-switched pulse energy at 1047 nm to 1547 nm of signal approached about 47%. For optimizing both Nd:YLF laser and IOPO we have numerically solved theoretical model. We have achieved 1.6-ns duration pulses at 1547 nm with energy of 0.5 mJ and peak power above of 300 kW. The beam quality was excellent (M2≈1).
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W. Zendzian, J. K. Jabczynski, J. Kwiatkowski, K. Kopczynski, "300-kW eye-safe intracavity OPO transmitter", Proc. SPIE 6952, Laser Source Technology for Defense and Security IV, 69520U (28 April 2008); doi: 10.1117/12.778880; https://doi.org/10.1117/12.778880

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