Different Plastic Materials Based Acousto-optic Modulators (AOMs) Design Considerations for Fast Switching Applications
نویسنده
چکیده
An acousto-optic modulator (AOM) allows to diffract a laser beam going through a crystal from the incidence angle (order 0) to another angle (order 1). The diffracted beam intensity depends on the radio frequency (RF) power applied to the device while the output angle depends on the material but is also proportional to the laser wavelength and to the RF drive frequency. When only intensity modulation is required, the driver frequency is fixed (thus the output beam angle) and the intensity is controlled, in analog or digital mode, by controlling the applied RF power. Long term stability and reliability are required from the driving electronics. This paper has presented the best candidate selected polymeric acousto-optic materials based AOM for upgrading speed response and transmission performance characteristics. These materials are common materials for acousto-optic devices such as polymethyl-methacrylate (PMMA), polycarbonate (PC), polystyrene (PS), and polysulfone (PSF). As well as we have deeply investigated the important transmission characteristics of acousto optic modulators such as transmission performance efficiency, transmission bit rate, diffraction angle and efficiency, transient speed response, signal transmission quality, bit error rate (BER) and modulation bandwidth under wide range of the affecting parameters for different selected acousto optic materials to be the major of interest.
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