AOTF RF drivers

AOTF RF Drivers for Acousto Optic Tunable Filters

ERZIA designs and manufactures RF Drivers for space-based acousto optic tunable filters (AOTF) and acousto-optic modulators (AOM). The limited energy available in space platforms, along with the demand for reliability, RF output power, and linearity requires a dedicated and specific approach to the design and implementation of these modules. ERZIA has several design approaches that allow a fast and efficient implementation of these modules for space applications, which can include not only the RF amplifier, but also additional features like housekeeping signals, variable gain, or special impedance matching.

AOTF RF Drivers Erzia

Our Acousto Optic Tunable (AOTF) RF drivers

  • A wide range of frequency configurations, from 15 to 500 MHz
  • Optimized output power: 0.25 W, 0.5 W, 1 W, 2 W, 3 W
  • Maximum output power up to 10 W
  • Optimized DC power consumption
  • Optimized harmonic rejection, even for multi-octave bandwidth

Customizing for you

  • Use some of our models “as is” or request your specific AOTF requirements
  • Complete customization of RF Drivers
  • On-demand housekeeping signals
  • On-demand Telemetry/Telecommand interfaces
  • Mechanical flexibility to meet instrument constraints

Sample project:
Lisa Pathfinder

The objective of the LISA Pathfinder mission is to demonstrate its ability to detect gravitational waves in space.

This project demonstrates a good example of a device custom-designed for a scientific payload instrument that includes several electronic modules and functions (RF amplifiers, power electronics, signal conditioning, control loops, detectors, etc.).

ERZIA has already provided three units (Flight Models and a Spare Model) that have already been integrated into the Acousto Optic Modulator, within the LISA Technology Package.

Our objective is to amplify an HF RF signal within very tight power efficiency and noise specifications. In detail:

  • Three-stage SSPA
  • Variable attenuator for signal leveling
  • Power detector
  • Linearizers for attenuation and power meter signals
  • Harmonics rejection
  • Optimized efficiency

The units are placed in the RF path that feeds the laser unit and provide a critical function within the overall systems.

Pictures copyright ESA


Designing and building an RF amplifier that can boost a low power generated RF signal required by an AOTF crystal that acts as an optical fiber may appear to be easy for experienced RF designers. However, the special conditions required for space-based scientific instruments make this task an interesting challenge.