LT3111 Series

Optical Detector by Laser Components

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The LT3111 Series from Laser Components are Single-Channel Voltage-Mode Pyroelectric Detectors that operate from UV to LWIR wavelengths. They have metal-black absorbers that can absorb any radiation incident on them. These detectors are based on DLaTGS or a thin LTO material that operates in voltage mode with an integrated JFET. They have an aperture size of 5.3 mm in diameter and are available in a 4-Pin TO-39 package. These photodetectors are ideal for FTIR, non-dispersive infrared spectroscopies, and THz detection applications.

Product Specifications

Product Details

  • Part Number
    LT3111 Series
  • Manufacturer
    Laser Components
  • Description
    Single-Channel Voltage-Mode Pyroelectric Photodetectors for FTIR, Spectroscopy & THz Detection


  • Application
    FTIR Spectroscopy, Non-dispersive Infrared Spectroscopy, THz Detection

General Parameters

  • Photodiode Material
    Pyroelectric, LiTaO3
  • Channels
  • Spectral Band
    Ultraviolet, Near-IR, Infrared
  • Supply Voltage
    9 to 25 V
  • Responsivity/Photosensitivity
    35 to 275 V/W
  • Active Area Diameter
    5.3 mm
  • Package Type
  • Package
    TO-39 4-pin Package
  • Note
    Load Resistor: 100 GOhms

Physical Properties

  • Dimensions
    2.0 x 2.0 mm


  • Operating Temperature display
    -20 to 85 Degree C
  • Storage Temperature
    -20 to 60 Degree C

Technical Documents

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