ERROR EFFECTS IN MICROLASER SENSORS

摘要

Microlaser sensors use the intracavity photoelastic effect in Nd:YAG-laser crystals to detect force and force-related quantities like torque, pressure and inertial acceleration. Error effects are caused by local and temporal temperature changes as well as by nonlinear influences of the laser crystal, its support and the load system. Measurement resolution is limited by seismic noise and non-reproducibility. We have achieved a low relative temperature coefficient of 10~(-6)/℃ and a relative reproducibility of 10~(-5) related to a maximum input load of 100 N. These results are advantageous properties compared with some competing force sensors.