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WL-IPD4A: Digital Integrating Photodiode with USB

Datasheet
Rev. 0 (08/2009)
(144kB PDF)

Description

The WL-IPD4A is a highly-integrated true gated charge integrator to be attached directly to up to 4 photo diodes. After a trigger pulse, all 4 inputs are integrated simultaneously for an adjustable amount of time (boxcar integrator). The measurement is digitized with integrated 20 bit analog-to-digital converters and transferred over the USB link to a computer.

The customer has the full choice over wavelength and sensitive area by providing the photodiodes to be integrated into the WL-IPD4A. Both silicon-based and InGaAs-based diodes with different sensitive areas can use used.

The WL-IPD4A comes in a rugged aluminum case and is powered via the USB connector.

Typical Applications:

  • Laser pulse monitoring and signal
    measurement in 1kHz systems
  • Shot-to-shot pulse noise measurements
  • Digtial 2 or 4 segment photodiodes

Features:

  • simultaneous integration of up to 4 inputs at up to 1.15kHz
  • each measurement includes signal and background acquisition
  • gate time 8us to 64us with internal timer
  • up to 16 bit effective resolution (20 bit ADC)
  • high accuracy, low drift
  • tunable full range 12pC to 350pC
  • easy-to-use USB interface
  • extremely low noise integrator:
    for 350pC full scale range <10ppm noise and
    <20ppm noise down to 50pC full-scale range (typ.)
  • external trigger rising or falling edge
  • small form factor: 60 x 83 x 21 mm (60 x 83 x 20 mm also available)