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A new scheme of cavity ring-down spectroscopy which utilizes injection seeding lock of diode laser by cavity feedback will be introduced. The spectroscopic method can be used to develop compact, portable, hyper-sensitive gas analyzers.
An efficient 1064 nm-pumped OPG that could be operated at room temperature using a PPMgSLT crystal is presented. 1.6 W total output for a 4.8 W input, power conversion of 50% was achieved.
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