Free Space Acousto-Optic Mode Lockers


The Brimrose Free Space Acousto-Optic (AO) Standing Wave Mode Lockers, with corresponding RF Variable Frequency drivers, are designed so the frequency matches the customer’s laser resonant cavity longitudinal mode frequencies. It is necessary to adjust the resonant laser cavity mode spacing frequency to be equal to twice the original acoustic wave frequency to achieve mode locking.

The mode-locking technique is actually a phase locking process, connecting the various longitudinal modes by fixing the relative phase differences among them.


  • Good Modulation Depth
  • Small Size
  • UV/VIS Optical Range
  • Suitable for High-Powered Lasers
  • Good Operating Stability of the Laser
  • Lower Noise Performance
  • High Modulation Bandwidth
  • Analog Light Intensity Modulation
  • Air, Water or Thermoelectrically Cooled
  • Laboratory Version
  • Custom Configurations Available


  • Photonic Sampling
  • Femtosecond Laser Micromachining
  • Corneal Surgery
  • Nonlinear Optics
  • Optical parametric oscillators
  • Optical Data Storage
  • OEM Designs

Brimrose Free Space Acousto-Optic Devices


  • MHz to 3 GHz Frequency Shift Ranges
  • High Modulation Bandwidth up to 400 MHz
  • Fast Modulation Speed <5 nsec Rise Time
  • High Diffraction Efficiency
  • UV to LWIR Wavelength Ranges
  • High Optical Damage Threshold