Signal-to-noise ratio for magnetooptic readout from MnBi films

The signal-to-noise ratio in an optical memory has been analyzed and examined experimentally. A solid-state detector can be used with MnBi as the storage media, but for media with smaller magnetooptic rotation, a photomultiplier is considered necessary. Analyzer orientation and light beam intensity have been included in the analysis. Results with experimental apparatus employing a crystal beam splitter at 45° angle and solid-state detectors compares well with analysis.