Avalanche photodiodes are optimized for lidar sensor applications

April 16, 2018 // By Christoph Hammerschmidt
With the Series 9, First Sensor offers a wide range of silicon avalanche photodiodes (APDs) with very high sensitivity in the near infrared (NIR) wavelength range, especially at 905 nm. With their internal gain mechanism, wide dynamic range and fast rise time, the APDs are ideal for LIDAR systems for optical distance measurement and object recognition using the propagation delay method. Application examples are driver assistance systems, drones, safety laser scanners, 3D measurement and robotics.

The Series 9 offers photodiodes as single elements as well as line and matrix arrays with several active sensor surfaces. Package options include rugged TO packages or flat SMD ceramic packages. The slow increase in the gain of the avalanche photodiodes with the reverse voltage allows a high gain to be set precisely and easily. Hybrid solutions are also available for particularly low light quantities, which additionally amplify the APD signal with an internal transimpedance amplifier (TIA). The integrated amplifier is optimally matched to the photodiode and allows compact designs as well as very large signal-to-noise ratios.

Due to its own semiconductor production and extensive development capacities, First Sensor can adapt its silicon avalanche photodiodes to special customer-specific requirements, e.g. in terms of sensitivity, gain, rise time or design.

Main features of the Series 9 APDs include:

  • Very high sensitivity in the range 905 nm
  • Wide dynamic range and fast rise time
  • Single diodes as well as line and matrix arrays
  • Rugged TO packages or flat SMD ceramic packages
  • Hybrid solutions with TIA

Further information: https://www.first-sensor.com/en/products/optical-sensors/detectors/avalanche-photodiodes-apd/series-9-with-enhanced-nir-sensitivity-900-nm/index.html