High Voltage Amplifier
18014-D02 Rev E, Sept. 3, 2019
Page 4
www.thorlabs.com
Part 2. Product Overview
The Thorlabs HVA200 High Voltage Amplifier is designed to directly drive the Thorlabs
Electro-Optic Modulators. The amplifier features: a large, ±200 V output, a continuous
current output of 100 mA, a wide, 1 MHz bandwidth, and low noise. The voltage gain of -
20 boosts the input up to the high voltages needed to drive our lithium niobate broadband
modulators. An adjustable bias allows for precise DC offset control.
The HVA200 uses a high voltage, wideband, high slew rate output amplifier to achieve an
output range of ±200 V at a bandwidth up to 1 MHz. The input amplifier includes a
summing junction which allows an adjustable DC bias to be added to the input modulation.
This composite signal is then boosted by a fixed voltage gain of 20 by the output amplifier.
For added safety, a front panel HV Enable button must be pressed to connect the HV output
to the output BNC. The output is automatically disabled each time the HVA200 is powered
on.
The DC Bias control consists of a rotary encoder which allows precise control and
repeatability. The bias adjustment is typically used to shift the DC level of the output as
needed by the application.
A voltage monitor output is provided to allow real-time monitoring of the high voltage
output. The monitor has a scaling of 20:1 so that an output of 200 V results in a 10 V
monitor voltage.
A USB port is provided to allow remote operation through a terminal interface.
