Acousto Optic Frequency Shifters
- Rich choice of materials (e.g. Crystal Quartz, Fused Silica,TeO2, Lead Molybdate)
- Models available within the wavelength range 244 to 15000nm
- RF frequencies ranging from 20MHz up to 1GHz
DescriptionAn acousto optic frequency shifter (AOFS) is a device that modifies the frequency of the optical beam. This is a consequence of the Doppler effect; the travelling acoustic wave causing the frequency of the optical beam to be either increased or decreased by an amount equal to the RF carrier frequency. Since the RF frequency is typically of the order of tens or hundreds of Megahertz, and the optical frequency is typically of the order of 100THz, the frequency shift is relatively small and would not normally be perceivable, for example as a visible change in colour.
Gooch & Housego manufactures acousto-optic frequency shifter (AOFS) based on various optical materials: Crystal Quartz, Fused Silica, Tellurium Dioxide, Lead Molybdate, Chalcogenide Glass, Gallium Phosphate, Silicon and Germanium. Thus, models for wavelengths from 244 to 15000 nm can be offered. Due to multiple available RF frequencies (from 20 MHz to 1 GHz), numerous deflection angles and compact sizes are achieved. To support the AOM, Gooch & Housego manufactures a range of RF drivers including single frequency, tunable frequency (VCO or DFS) and dual frequency master / slave models.