[en] This report on the IAEA Technical Committee Meeting on LIDAR (LIght Detection And Ranging) Thomson Scattering, held at the JET Joint Undertaking, Abingdon, Oxfordshire, United Kingdom, 8-10 April 1991, summarizes reviews of (1) the existing JET LIDAR system; (2) developments in solid state, visible and near IR lasers that are of potential interest for LIDAR applications; (3) possible laser sources, including Excimer and CO₂ for their interesting pulse duration and repetition rate if suitable detectors can be found; (4) a compact design for a Nd phosphate glass system; (5) short pulse length (30-50 ps) laser requirements to obtain improved spatial resolution needed for the divertor region plasma in tokamaks; (6) a more advanced laser design using a so-called light boiler and wave front reversal (WFR) cells; (7) possibilities to use Nd:YAG laser wavelengths in a LIDAR system; a session on detectors and analysis methods describing (8) the new Scancross streaking intensifier; (9) detectors for LIDAR Thomson scattering (advantages of streak cameras, photomultipliers, and gated intensifiers); (10) results of investigations into the use of an AGAT streak camera as a possible LIDAR detector; (11) assessment experiments on a Hamamatsu streak camera planned for use on the Large Helical Device (heliotron); (12) studies on the usefulness of microchannel plate photomultipliers as detectors in the JET LIDAR system; (13) conventional Thomson scattering application of microchannel photomultipliers on the reversed-field pinch RFX; (14) a description of the Nd:YLF 10 Hz laser based scattering system for FTU; (15) the feasibility of a 8-10 Hz LIDAR system; (16) some aspects of Raman calibration of scattering systems; (17) use of statistical analysis of data for recovering calibrations of a data set; and, finally, a session on LIDAR systems for future devices, especially (18) ITER and BPX, with ITER requiring development of radiation hard optics capable of withstanding both thermal loads and laser power density simultaneously; while the possible use of near-resonant Rayleigh scattering in a hybrid LIDAR system for ITER was discussed