OPTOELECTRONIC TEST AND MEASUREMENT EQUIPMENT, OPTOELECTRONIC TIMING, SENSING AND DATA TRANSMISSION and RECEIVING EQUIPMENT, HIGH-FREQUENCY PULSED LASERS, SEMICONDUCTOR LASERS, LASER SCANNERS, LASER RANGING DEVICES, OPTOELECTRONIC WAVEGUIDES, OPTOELECTRONIC SEMICONDUCTOR TIMING DEVICES, OPTOELECTRONIC FREQUENCY GENERATORS, AND OPTOELECTRONIC CLOCK SIGNAL GENERATORS