Optical and laser instruments, devices, and accessories for industrial use, for measuring purposes, for measuring systems, for welding devices, electronic and optical communications instruments and components, namely, optical transmitters, optical receivers, and communication link testers for testing communication links, RF tuning devices, namely, resonators, not for medical use, namely, for use with fiber optic laser sources, ultra-short pulse lasers, fiber optic laser amplifiers, electrical picosecond pulse generators, chirped laser pulse amplifiers for high energy output; accessories and subsystems for the above products, namely, lasers for industrial use, laser welding devices, laser measuring systems; laser diodes, lasers for measuring purposes, lasers not for medical use; products and instruments for multiple purposes including scientific measurement, imaging, generation of terahertz radiation, and environmental sensing, namely, radiation-measuring instruments; scientific instruments, namely, electronic analyzers for measuring, testing and detecting contaminants and environmental pollutants; stand-off explosives and chemical detection system comprising strobe and probe lasers, optical detectors and digital signal process units; electric, electronic, or electrochemical oxygen monitors and sensors for environmental use; medical imaging apparatus for small animals, in a research laboratory environment; electronic magnetostrictive equipment, namely, a wave generator, wave sensor and wave analyzer