Electro-optic instruments for laboratory use, namely, laser diode drivers, laser diode controllers, laser diode temperature controllers, optical power and wavelength meters; electro-optic instruments for laboratory use, namely, laser diode control kits, consisting of a laser diode driver, temperature controller, mount and cables, sold as a unit for use in operating laser diodes; electro-optic instruments for laboratory use, namely, laser diode and light-emitting diode (LED) test systems consisting of high power current sources, cooling modules, modular electromechanical mounts, optical detectors and data-logging software; and electro-optic instruments for laboratory use, namely, test systems consisting of low-noise current sources, high precision voltage detectors, high precision optical detectors, high precision temperature controllers, testing and graphical user interface software for use in characterization of the light current voltage (LIV) parameters of laser diodes and light emitting diodes (LEDs)