Products HomeLiTaO3 Pyroelectric Detector
- Wavelength Range from 0.6 µm to 16 µm
- Flat Response Over Wavelength Range
- Available in TO-39 Package
EPD13
LiTaO3 Pyroelectric Detector, 0.6 - 16.0 μm, TO-39 Package
Application Idea
EPD13 Detector Shown in an S1LEDM LED Mount Attached to a Post with an LMR1 SM1-Threaded Optic Mount
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| Mounted and Unmounted Detectors |
|---|
| Photodiodes |
| Mounted Photodiodes (200 - 1800 nm) |
| Unmounted Photodiodes (200 - 2600 nm) |
| Pigtailed Photodiodes (320 - 1000 nm) |
| Calibrated Photodiodes (350 - 1800 nm) |
| Photovoltaic Detectors (2000 - 10 600 nm) |
| Thermopile Detectors (190 - 20 000 nm) |
| Pyroelectric Detector (600 - 16 000 nm) |
Features
- Wavelength Range: 0.6 µm to 16 µm
- For Pulsed or Chopped Light Sources
- Detector Active Area: 1.3 mm2 (Ø1.3 mm)
- Flat Response Over Entire Wavelength Range
Thorlabs' EPD13 Pyroelectric LiTaO3 (Lithium Tantalate) Detector is designed for use with pulsed light signals between 0.6 µm and 16 µm. It is packaged in a TO-39 can with a ZnSe (zinc selenide) window.
Pyroelectric materials produce a voltage difference in response to a change in temperature. The EPD13 pyroelectric detector utilizes an LiTaO3 (lithium tantalate) sensor coated with a black metal absorber. The metal absorber and LiTaO3 sensor absorb the incident light causing a change in temperature and therefore a voltage difference. Since a change in temperature is required to produce a signal, the detector requires a modulated or pulsed light source. CW sources will not produce a signal once the detector reaches thermal equilibrium.
The lithium tantalate material has a generally flat response curve over the entire operating wavelength range, making the EPD13 detector useful for applications with broadband signals or with light from visible to MIR wavelengths. For more information on the ZnSe window transmission and the absorbance of the black metal coating and LiTaO3 sensor, please see the performance graphs in the Specs tab. For an electrical circuit that is compatible with the EPD13 detector, please see the Example Circuit tab. An amplified version of this detector is also available.
| Specification | Value |
|---|---|
| Detector | Pyroelectric Lithium Tantalate (LiTaO3) |
| Wavelength Range | 0.6 to 16 µm |
| Typical Absorptiona |  |
| Responsivity (500 K, 100 Hz, 25 °C)b | 120 V/W |
| Detector Active Area | 1.3 mm2 (Ø1.3 mm) |
| Detectivity (500 K, 100 Hz, 25 °C)b | 3.0x108 (cm·Hz1/2)/W |
| Noise Density (rms) | 65 nV/(Hz1/2) |
| Thermal Time Constant | 50 ms |
| Package | TO-39 |
| Window Material | ZnSe (0.8 mm Thick) |
| Typical Window Transmissiona |  |
| Acceptance Angle | 130° (Typical) |
| Weight | 1.5 g |
| Detector Surface Depth (Approximate) | 1.6 mm (0.06") |
| Max Drain / Source Voltage | 18 V |
| Operating Temperature | -25 to 60 °C |
| Storage Temperature | -25 to 60 °C |
Figure 3.1 shows an example of an electrical circuit to support the EPD13 pyroelectric detector. The detector is represented by the blue shaded box, with its three pins corresponding to drain, source, and ground/case labeled.
Figure 3.1 Example Circuit for EPD13 Detector
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The following table lists Thorlabs' selection of photodiodes, photoconductive, and pyroelectric detectors. Item numbers in the same row contain the same detector element.
Pyroelectric Detector