The problems of working out the IR-CW-LFM-lidar with transformation of one frequency laser radiation into two frequency and tuning probability are considered. Comparative analysis results for characteristics of two frequency laser radiators put into differential IR-CW-LFM-lidars are given. The perspectivity for amplitude-phase electrooptical devices developmeni is shown. Their scheme decisions are considered. Theoretical and experimental investigation results of transformation parameters effect on purity of radiator output spectrum, as the main function, which determines the metrological characteristics of IR-CW-LFM-lidar on the whole are presented. The possibilities of IR-CW-LFM-lidars with frequency transformation realizing different ways of gas remote sensing are estimated. The experimental setup's structural scheme is presented.

Development of system version for inspection of water and main transitions of oil product pipings, based on broad possibilities of different purpose fibre optic sensors, are considered. Short overview of existing sensors, classified on stages of their using in systems for inspection of oil product pipings, is given. Requirements to the inspection system and its separate units are determined. Block diagram of one system version is brought.

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