Acousto-Optic Mode Lockers

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.

KEY FEATURES

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

APPLICATIONS

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

TECHNICAL SPECIFICATIONS

  
    Model #
    FSML-40-20-BR-800
    FSML-80-20-BR1064
    FSML-125-30-BR800
    FSML-125-30-BR1064
  

    Substrate
    Fused Silica
    Fused Silica (Uncoated)
  

    Laser Wavelength
    Brewster Cut optimized for horizontal polarization at:
  

    800 nm
    1064 nm
    800 nm
    1064	 nm
  

    Active Aperture
    Up to 5 x 5 mm
  

    Carrier Frequency
    40 MHz
    80 MHz
    125 MHz
    125 MHz
  

    Modulation Rate
    80 MHz
    160 MHz
    250 MHz
    250 MHz
  

    3dB Bandwidth
    ± 50
    ± 10
    ± 15
    ± 15
  

    Optical Transmission
    99.7%
  

    Resonant Modulation Depth
    70%
    60%
    50%
    30%
  

    Acoustic Velocity
    5.96E+3 m/sec
  

    Wave Front Distortion
    λ/10
  

    Input Impedance
    50 ohms
  

    Maximum Electric
Input Power *
    5 – 7 Watts
  

    V.S.W.R.
    N/A
  

    Case Type
    Water cooled
  