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Acousto- and Electro-Optics

Acousto-optic Modulators

Acousto-optic modulators (AOM, or also known as Bragg cells) consist of a crystal that is transparent to the laser light, a piezoelectric transducer and a sound absorber that is designed to prevent standing waves from forming in the crystal. When an electric field is applied to the piezoelectric transducer, sound waves are generated in the crystal, which modulate the refractive index. This allows the power, direction and frequency of the laser beam to be controlled.

AOMs are used for the following applications, among others:

  • Q-switching of solid-state lasers
  • Generation of ns pulses and ultrashort pulses
  • Active mode locking
  • As external modulators, e.g. for laser communication systems
  • Pulse pickers to increase the pulse energy but lower the pulse repetition rate
  • Continuous power modulation or switches
  • Noise suppression

 

For AOMs, we offer crystals made of TeO2, crystalline quartz and fused silica.

Electro-optic Modulators

An electro-optical modulator (EOM) consists of a Pockels cell and other optical components such as polarizers. A Pockels cell is a non-linear crystal and can change the refractive index when an electric field is applied. This allows the power, phase and polarization of the laser beam to be controlled.

EOMs are used for the following applications, among others:

  • Power modulation (e.g., for laser printers or optical communication)
  • Laser frequency stabilization
  • Q-switching of solid-state lasers
  • Active mode locking
  • Fast optical switch

 

For EOMs we offer KDP, KTP, BBO, LiNbO3 and LiTaO3 crystals.

 

EOM

An electro-optic modulator (EOM) consists of a Pockels cell and other optical components such as polarizers. A Pockels cell is a non-linear crystal and can change the refractive index depending on the applied voltage. As a result, power, phase and polarization of the laser beam can be controlled.

EOMs can be used for:

  • Power modulation (e.g., for laser printers or optical communication)
  • Laser frequency stabilization
  • Q-switching of solid-state lasers
  • Active mode locking
  • Fast optical switch

For EOMs, we offer KDP, KTP, BBO, LiNbO3‐ und LiTaO3 crystals.

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