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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.
We have developed a new LIBS signal enhancing method synchronizing an inert gas pulse with a laser pulse. Using this method, the signal enhancement factor of ~8 could be obtained. Detailed mechanisms will be discussed.
We have observed dynamic effects of a pre-ablation spark on the signal intensity in the orthogonal dual-pulse laser-induced breakdown spectroscopy. We applied pre-ablation and ablation laser pulses with significantly reduced energy for an aluminum metal in open air. Under this experimental condition, the well-known signal enhancement through the increase in ablated mass was negligible. The Al I and...
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.
This paper proposes a conditional access system (CAS) that is appropriated in T-DMB and based on an effective multiplexing method for providing a variety of encrypted T-DMB services. The developed CAS in T-DMB is designed to encrypt selected services of all T-DMB services according to the CA modes. Transmitting T-DMB transport stream encrypted by the proposed Ensemble multiplexer, we verified their...
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