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Balanced photoreceiver with InGaAs PD, 100 MHz, Free space

Artikkelnr.: HBPR-100M-60K-IN-FS

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  • Common-Mode Rejection Ratio (CMRR) typ. 45 dB
  • Very low noise, NEP  
  • Switchable 20 MHz low pass filter to minimize wideband noise
  • High gain switchable in two stages
  • Switchable output coupling (AC/DC)
  • Fast DC-coupled monitor outputs with 10 MHz bandwidth
  • Free space input
  • 1.035 "-40 threaded free space input, compatible with many standard optical systems

800-1700nm photodiode, 2x10^4 V/W switchable gain, NEP  4.3 pW/√Hz

By taking the exact difference between the two input signals, common-mode noise, such as the intensity noise of the laser source used, is suppressed. This way, smallest optical signals can be extracted from the signal measurement path that would otherwise be buried in the noise.

The photoreceivers of the HBPR series consist of a combination of two anti-parallel connected photodiodes with a subsequent low-noise transimpedance amplifier. The photodiodes are carefully selected and matched in pairs to achieve the highest possible common mode rejection ratio (CMRR). The low input noise (NEP) and excellent common mode rejection set standards for balanced photoreceivers in the MHz range and enable highly sensitive signal detection. The high bandwidth allows the precise detection of laser pulses, even with high repetition rates and rapidly changing signal shapes, such as in quantum state tomography.

Thanks to additional features such as switchable bandwidth limitation (low-pass filter), separate fast monitor outputs, adjustable offset and switchable AC/DC coupling, the photoreceivers of the HBPR series are among the most versatile balanced photoreceivers.