Fiber-Coupled AOM User Manual

2024-11-19
●A radio frequency (RF) signal applied to the piezoelectric transducer generates a travelling acoustic wave in the bulk material. This acoustic wave produces a refractive index ‘grating’. Incident light is diffracted from this grating.
●The amplitude (intensity) of this diffracted light may be controlled by adjusting the applied RF power. The acousto-optic interaction also generates an inherent frequency shift (Doppler Effect), such that the diffracted light has frequency = incident light + RF drive frequency as indicated in the diagram.
●Operation Scheme
■To use a fiber-coupled acousto-optic modulator (AOM), connect the two fiber ports (reciprocal) into the light path, then connect the driver to the AOM SMA connector using a suitable RF cable.
■Adjust the RF power level to optimise throughput (minimise insertion loss), taking great care not to exceed the maximum recommended RF power (as indicated in the specifications).
■The diffracted light may be modulated via the analogue or digital modulation input on the RF driver.

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May 2017

Issue 1.1

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