Powerful 3-μm lasers acousto-optically Q-switched with KYW and KGW crystalsстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 11 ноября 2019 г.
Аннотация:We report the first use of KYW and KGW acousto-optical Q-switches in 3-m powerful lasers. Q-switches of two different designs (normal-incidence with antireflection coatings, and Brewster-angle cut crystals) operated in lasers based on Er:YAG, Cr:Yb:Ho:YSGG and Cr:Er:YSGG laser crystals. Gain and lifetime of laser crystals significantly influence the regime of Q-switched generation. Er:YAG and Cr:Yb:Ho:YSGG lasers deliver pulses with 10.8 mJ and 17.5 mJ energy respectively. Pulses with the energy of 29.6-mJ and duration of 75-ns in the TEM00 mode are obtained in a Cr:Er:YSGG laser. The energy is scaled up to 85.7 mJ in the two-stage MOPA system. Powerful laser systems of this kind are in the region of interest for pumping other mid-IR laser media (e.g. Fe:ZnSe and Fe:CdSe), OPOs, CO2 lasers and amplifiers. Preliminary experiments on microstructuring of transparent materials by the LIBWE method demonstrated potential of such lasers to build the foundation for dye free tissue and cell engineering concepts.