Fiber-coupled Acousto-Optic Frequency Shifters

Fiber-coupled Acousto-Optic Frequency Shifters

Brimrose’s Fiber-coupled, Acousto-Optic Frequency Shifter Systems are used to shift the frequency of various optical signals. Due to a Doppler Shift, the frequency of the diffracted first order optical beam in the AO modulator or AO frequency shifter is shifted in frequency (wavelength) by the acoustic carrier frequency (wavelength).

If the incident acoustic wave is introduced in the direction of the incident optical wave, the laser frequency shifts towards the higher side. If the incident acoustic wave is introduced in the opposite direction of the incident optical wave, the laser shifts toward the lower frequency side.

The typical 3 dB spectral range of an AOFS device is ~60-120 nm and the 3 dB frequency shift range is ~10% of the center frequency. For wide bandwidth applications, Brimrose developed an AOFS with an extended frequency shift range of up to 100 MHz.

KEY FEATURES

Low Insertion Loss
Broad Wavelength Range
Low Power Consumption
Hermetically Sealed
Low RF Drive Power
Stable Performance
Good Temperature Stability and Reliability
Custom Configurations Available

APPLICATIONS

Fiber Sensing
Heterodyne Detection
Interferometric Fiber Sensor Systems
Laser Doppler Configurations
OEM Designs

TECHNICAL SPECIFICATIONS

  
    Model #
    Wavelength XX (nm)
    Insertion Loss (dB)
    Frequency Shift (MHz)
    Fiber Type
  

    TEF-125-XX-2FP
    360-1600
    2.5-4.0
    +125 or -125
    SM or SMPM
  

    TEF-200-XX-2FP
    360-1600
    2.5-4.0
    +200 or -200
  

    TEF-300-XX-2FP
    360-1600
    3.0-5.0
    +300 or -300
  

    TEF-1000-XX-2FP
    360-1600
    8.0-12.0
    +1000 or -1000
  

    IPF-200-XX-2FP
    980-2000
    2.3-5.0
    +200 or -200
    SMPM
  

    IPF-500-XX-3FP
    980-2000
    2.3-6.0
    +500 or -500
  

    IPF-1000-XX-3FP
    980-2000
    8.0-11.0
    +1000 or -1000
  

    IPF-1500-XX-3FP
    980-2000
    9.0-12.0
    +1500 or -1500
  

    AMF-25-XX-2FP
    980-2900
    2.0-2.2
    +25 or -25
    SM or SMPM
  

    AMF-55-XX-2FP
    980-2900
    2.0-2.2
    +55 or -55
  

    AMF-100-XX-3FP
    980-2900
    2.1-3.3
    +100 or -100
  

    AMF-150-XX-3FP
    980-2900
    2.1-3.9
    +150 or -150
  

    IPF-200-100-XX-2FP
    980-2000
    6.0-8.0
    +150 to +250 or –150 to –250
    SMPM
  

    IPF-300-100-XX-2FP
    980-2000
    6.0-8.0
    +250 to +350 or –250 to –350
  

    TEF-200-100-2FP
    360-1000
    6.0-8.0
    +150 to +250 or –150 to –250
    SM or SMPM
  

The Fiber-coupled Frequency Shifter models shown above represent some examples of our fabrication capabilities. In addition, other wavelengths, frequencies or configurations are available.