Heterodyne detection of small angle scattered far‐infrared laser radiation

摘要

AbstractA heterodyne detection scheme for far‐infrared small angle scattered laser radiation is reported and demonstrated by measuring the known scattering from a thin wire scatterer. Frequency shifts were on the order of 10 Hz. A Golay cell was used as a detector. The results were compared with theoretical predictions and direct detection data. The method should be useful for scattering measurements of density waves in plasma