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


Mission Leader Awarded 2020 Tycho Brahe Medal

The objective of the LISA Pathfinder mission was to demonstrate the ability to detect gravitational waves in space. It was a new breed of spacecraft that called for a profound change of mindset with respect to spacecraft hardware, and It was ERZIA’s first contract to design products for spaceflight missions. Since then, ERZIA has been continuously participating in space programs, delivering flight high power amplifiers which are now operating around the Earth and Mars, and even on the surface of the Moon and Mars.

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

ERZIA provided three RF amplifiers (two flight models and a spare) that were integrated into the Acousto Optic Modulator within the LISA Technology Package. The units were placed in the RF path that fed the laser unit and provided a critical function within the overall systems. The objective was to amplify a HF RF signal within very tight power efficiency and noise specifications. ERZIA product details included:

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


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.