Application Cases

Experiment Name: Application of ATA-2031 High-Voltage Amplifier in Speckle Suppression Using Polymer-Stabilized Liquid Crystals

Experiment Content:
The ATA-2031 high-voltage amplifier is used to amplify the signal from a signal generator and apply it to a polymer-stabilized liquid crystal (PSLC) device. The speckle suppression performance of the PSLC under different voltages and waveforms is analyzed.

Research Direction: Speckle Suppression in Electro-Optic Devices

Test Equipment: ATA-2031 high-voltage amplifier, signal generator, oscilloscope, polymer-stabilized liquid crystal device, etc.

Figure 1: Experimental Framework Diagram

Experimental Procedure:
The experimental system consists of an optical system, a driving power system, and a data processing system. The optical system uses a laser diode with a central wavelength of 520 nm (LP520P50, Thorlabs) as the coherent light source. The laser includes a beam expander for beam expansion and collimation. The collimated laser beam passes through the prepared PSLC device and is finally detected by a photodetector with a time resolution of 18 ns. The power system comprises a function generator, a voltage amplifier, and an oscilloscope. The function generator outputs an AC electrical signal, which is amplified by the voltage amplifier and applied to the electrodes of the PSLC. Both the electrical signal from the function generator and the signal detected by the photodetector are captured by the oscilloscope, and the response time is determined by comparing the two waveforms. Additionally, the average transmittance of the PSLC device under different voltages is measured using a spectrometer.

Experimental Results:

Figure 2: Experimental Results

Compared with pure PSLC, PSLC doped with silver nanowires can further improve speckle suppression efficiency (46.9%). This method is a relatively simple approach for preparing PSLC devices, achieving speckle suppression performance comparable to or better than other methods under low driving voltages. Furthermore, its compact and static characteristics make it suitable for a wider range of speckle suppression scenarios. In the future, PSLC performance will be optimized by adjusting the doping concentration of silver nanowires and the spacer layer thickness to achieve better speckle suppression efficiency. Additionally, once the PSLC device reaches saturation, higher driving voltages do not significantly improve speckle suppression. Therefore, in practical applications, the low and high driving voltages can be set to the threshold voltage and saturation voltage of the PSLC device, respectively (Vl = Vth, Vh = Vsat), to further reduce power consumption.

Recommended High-Voltage Amplifier: ATA-2031

Figure: ATA-2031 High-Voltage Amplifier Specifications

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