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Optical Components
Optical components for medical/beauty treatments
tOptical materials
tWindows for CCTV Housings
tAR and conservative products
tFront Surface Mirror and partial refleting mirros
tLaser Diodie Devices
tVisible and IR Sensors
tmicrosignal Amplifiers
tmicrosignal Photoreceivers
tOpto-Mechanical Components
tIrreversible Thermometers

Technical specifications

  • High quality
  • Economically priced
  • Available fiber inputs: FC, SMA and ST
  • Very low time constant
  • Variable gain amplifier
  • Manual and remote control operation
  • Custom design upon request



With the completely newly developed HBPR photoreceiver/photodetector platform, FEMTO has raised the bar in the field of balanced photoreceivers to a new level.

Two photodiodes connected in anti-parallel subtract the two input signals and feed the difference to a subsequent low-noise transimpedance amplifier. The extraordinarily high common mode rejection, the low input noise and bandwidths up to 500 MHz set new standards and enable highly sensitive signal acquisition.

In addition to the outstanding technical data, great importance was attached to user-friendly details and versatility when developing the new HBPR platform: thanks to:

  • Free space and fiber-coupled inputs
  • Switchable gain and bandwidth
  • Switchable AC/DC coupling
  • Broad mechanical compatibility with common optical accessories

the photoreceivers of the HBPR series are among the most versatile balanced photoreceivers/photodetectors on the market.

Typical applications are:

  • optical spectroscopy
  • coherent heterodyne detection
  • homodyne detection of optical quantum states
  • optical coherence tomography (OCT)
  • differential optical front end for oscilloscopes
  • spectrum analyzers
  • A/D converters and lock-in amplifiers

Please find more details on the HBPR series product page