Lastek Principals

Amplifiers

The Thorlabs HBA30 High-Bandwidth Piezo Amplifier is designed for driving high-speed piezoelectric actuators. The output signal range is -3 V to 30 V with a 500 kHz -3 dB bandwidth with no load; see Figure 1.3 for the frequency response of the power gain at common piezo load capacitance values. The piezo amplifier can achieve a continuous AC RMS output current of 2.0 A and a peak AC current of 6.0 A. The low phase difference between the input and output signals for typical piezo capacitance values, with <60° at 600 kHz with no load, as shown in Figure 1.4, leads to increased stability and a higher bandwidth when using this piezo amplifier in a feedback loop.

A high-bandwidth piezo amplifier is recommended for use in systems requiring a fast response with a micrometer scale piezoelectric range of travel. If a larger range of travel is needed, an approach to increasing the range while maintaining the fast bandwidth is to use a slower, long-scan piezoelectric actuator to correct the low-frequency, near-DC shifts, driven by a  BPA100 High-Voltage Piezo Amplifier, in addition to a fast piezo driven by the HBA30 amplifier.

Features:

  • 500 kHz -3 dB Bandwidth with No Load
  • <60° Phase Shift at 600 kHz with No Load
  • Output Voltage Range: -3 V to 30 V
  • Up to 2.0 A Continuous Current (AC RMS) and 6.0 A Peak Current
  • Protections for Short Circuit, Voltage Overload, and Device Overheating

Applications:

  • Laser Frequency and Phase Control
  • Optical Cavity Control
  • Optical Parametric Oscillators
  • Frequency Combs
  • Cavity Ring Down Spectroscopy
  • Phase-Sensitive Detection and Stabilization in Interferometers

Image above shows the HBA30 High-Bandwidth Piezo Amplifier with an Input, Monitor, and Output BNC Connection

Figure: HBA30 High-Bandwidth Piezo Amplifier Power Gain Response at Various Capacitive Loads, 3 V Peak-to-Peak Input (Click Here to Download Raw Data)

Figure:  HBA30 High-Bandwidth Piezo Amplifier Phase Response at Various Capacitive Loads to 3 V Peak-to-Peak Input (Click Here to Download Raw Data)

 

 Key Specificationsa
Item # HBA30
Bandwidth 500 kHz (-3 dB, No Load)
Voltage Output Range -3 V to 30 V
Voltage Gain 10 ± 0.2
Output Current 2.0 A Continuous (AC RMS), 6.0 A Peak (AC)
Noise <0.5 mV RMS
(20 Hz to 300 kHz Bandwidth, No Load)b
Typical Piezo Capacitancec 1 nF to 660 nF
  • All specifications are typical at 25 °C, unless otherwise stated.
  • Total noise will be reduced with a higher capacitive load.
  • The unit will drive loads with a capacitance outside the stated range - see Figure 1.3 for response data. An increased load capacitance leads to a lower -3 dB bandwidth.
Thorlabs Thorlabs Systems

Detection

Principals: Detection