Contact

Laser Components USA, Inc.
116 South River Road
Building C
Bedford, NH 03110
USA
Use our REQUEST FORM*
or call us +1 603 821 7040
* by clicking on this link you will be redirected to an external site
  • English

Si APDs

Silicon avalanche photodiodes are used in the wavelength range between 260 nm and 1100 nm. The avalanche effect of these photodiodes makes them well suited for the detection of extremely weak light intensities.

Silicon APDs for Photon Counting

The SAP-series silicon avalanche photodiodes are primarily used in photon counting. This series features highest efficiency and lowest dark current rates.

The SAP-series is based on a "reach through” structure with excellent quantum efficiency as well as extremely low noise and dark current. This APD, which has an active area of D=500 µm, can either be operated in normal linear mode (VR < VBR) with an internal gain of 250 or more or in "Geiger” mode.

In "Geiger” mode the APD is operated at a voltage that is larger than the breakdown voltage (VR > VBR); in this mode, single photons can be detected.

 

Applications

The SAP-series is well suited for applications that quantify the weakest light signals (including single photons) and detect them in a time-resolved manner (e.g., LIDAR, spectroscopy, fluorescence measurements, or photon counting). The advantages compared to photomultipliers (PMTs) are as follows:

  • Small compact design
  • Very high quantum efficiency
  • Not sensitive to magnetic fields
  • Robust
  • Long lifetime
  • Very good time resolution
  • Inexpensive
  • Smaller operating voltage

The SAP-series is available in a modified, hermetically-sealed TO-46 housing. A version is also available with a single-stage thermoelectric cooler in a TO-37 housing or a double-stage TEC in a TO-8 housing.

 

read more »

Your contact person

Paul Buettner
Use our request form*

+1 603 821 7040

* You will be redirected to an
external website created by Laser Components USA.

News »
21.06.2023

Cost-efficient InGaAs APDs

LASER COMPONENTS expands its r...