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| Acousto-Optic Frequency-Shifter 声光移频器 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Utilising a wide range of materials including Crystal Quartz, Fused Silica, Tellurium Dioxide, Lead Molybdate, Chalcogenide Glass, Gallium Phosphate, Silicon and Germanium allows us to offer devices operating in the wavelength range 244 to 15000nm and RF frequencies ranging from <20MHz to >1GHz. We also manufacture a range of RF drivers including; single frequency, tunable frequency (VCO or DFS) and dual frequency master / slave. Typical applications include Interferometry, vibrometry & atom cooling. |
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AOFS for Fibre Sensors
M040-8J-F2S
l Polarisation insensitive l Choice of wavelengths, 1450 to 1650nm l Choice of operating frequencies, 35 to 45MHz
A compact fibre-coupled acousto-optic frequency shifter ideal for use in interferometric fibre sensor systems such as Mach-Zehnder and laser Doppler configurations.
Available in frequencies from 35 to 45MHz and either up-shift or down-shift. This device operates over a broad wavelength range making it the first choice frequency shifter for distributed sensor networks.
Specification
Options Frequency: 35 to 45MHz Frequency Shift: Up shift Wavelength Range: Centred on 1500 to 1580nm Fibre Type: Polarisation maintaining, multimode Fibre Connectors: Pig-tails for splicing, FC/APC
Driver Selection Digital
Modulation: A118, N21040-0.4DM |
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 AOM |
An AO
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 1014Hz, the frequency shift is relatively small and would not
normally be perceivable, for example as a visible change in colour.
