Specifications

The LASS-II (Laser Amplitude Stabilization System) is an electro-optic feedback loop designed to reduce amplitude variations commonly associated with most gas lasers. This system is capable of significantly enhancing the signal/noise ratio of the laser over a much broader bandwidth than typical optically coupled current modulation of the plasma tube. Both an internal and external reference input is provided, allowing analog programming of the laser throughput. This is particularly convenient for use in recording systems where laser power must be varied as a function of position on the recording medium (i.e. video disc, flat bed recorders, etc.). The system is composed of three separable units, the feedback electronics, power supply and electro-optic modulator with integrated beam-splitter and photodiode amplifier.