HeliX™ Silicon Avalanche Photodiode Module

Capture d’écran 2015-03-02 à 09.00.13

Excelitas’ new HeliX Silicon Avalanche Photodiode (SiAPD) Module is a compact, easy-to-use, analogue low-light-level detection (L³D) module employing Excelitas’ leading-edge SiAPD chips. The detector is in a hermetic TO package, mounted on a practical OEM based PCB which includes high-voltage power supply, temperature compensation, a low-noise transimpedance amplifier, APD bias monitor and micro-controller. 

Supplier: Excelitas


  • High responsivity: 650KV/W @ 900 nm
  • Transimpedance amplifier
  • Temperature compensation to stabilize gain and responsivity
  • User controllable gain and responsivity

With this compact voltage-output module, the preamplifier gain is optimized to obtain maximum dynamic range and linearity with the APD at gain adjustable operating voltage. It optimizes APD operation in key performance parameters such as higher sensitivity, and better signal-to-noise ratio across the 400nm – 1100nm wavelength range. The HeliX APD module is offered as a standard, commercial-offthe-shelf (COTS) product. It contains a 0.5mm diameter reachthrough SiAPD. In addition to our standard, off-the-shelf APD module, Excelitas also offers customized modules tailored to the needs of the customer. Depending upon customer requirements, modifications can include a different APD, a cost effective PCB module, optional calibration, bandwidth optimization, FC-connectorized packaging and customized testing.


  • User-friendly compact footprint  ROHS Compliant
  • Front plate can accommodate various APDs
  • Single + 5V operating voltage at input provides HV and LV internal biases for APD and TIA
  •  50Ω SMA output connector

Product applications

  • Fluorescence measurement
  • Distributed temperature sensing (DTS), or distributed optical sensing
  • Analytical instrumentation
  • Confocal laser endomicroscopy

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