Abstract
The design and construction of a new photodiode/transimpedance amplifier system aimed at minimizing short and long-term drifts in both zero stability and gain settings is described. The development of this device is part of an effort to improve the performance of radiant power laser stabilization systems by one order of magnitude beyond that currently being achieved. The contribution of sources of noise due to electrostatic induction, earth-loop currents, thermoelectric effects, electrochemical emfs and mechanical stresses in cables was minimized. Long-term sources of drift due to ambient temperature fluctuations were eliminated by selecting the components being used and by actively stabilizing the temperature of the photodiode and the supporting transimpedance amplifier.
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