Measurement of High Intensity Noise

The Effects of High Intensity Noise on Human Equilibrium

Safety standards and measurement techniques for high intensity light sources.

White-Noise Modulation of High-Frequency High-Intensity Discharge Lamp Ballasts

In this paper, a new method is proposed to avoid acoustic-resonance-related instabilities in metal halide lamps when operated with a high-frequency electronic ballast. Angle modulation of the inverter switching pattern has been used as a vehicle to randomize lamp driving frequency and to limit lamp power spectrum below the instability threshold. The optimal modulating pattern is obtained by stu...

Preference Intensity Measurement

The concept of preference intensity has been criticized over the past sixty years for having no substantive meaning. Much of the controversy stems from the inadequacy of measurement procedures. In reviewing the shortcomings of existing procedures, we identify three objectives for developing a satisfactory procedure: (1) the capability of validating expressed preference differences by actual cho...

High-Dynamic-Range Laser Amplitude and Phase Noise Measurement Techniques

We describe techniques for making sensitive and high-dynamic-range measurements of laser amplitude and envelope phase noise (timing jitter) in the frequency domain at the shot-noise limit. Examples of amplitude noise measurements on continuous-wave argon-ion and diode-pumped solid-state lasers used for pumping a femtosecond Ti : sapphire laser are presented. Amplitude and phase noise measuremen...