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Datasheet: Broadband Pyroelectric THz Radiometer: SPI-A And SPI-D
Measure from 100 nW to 2 mW and 0.1 to 30 THz
These Broadband Pyroelectric Radiometers are optimized for use in the
THz spectrum and are available as either analog or digital instruments.
The SPI-A Analog probes are powered by battery or the DC power
module we supply and are intended for use with your standard Lock In
Amplifier or Oscilloscope. The SPI-D Digital probes, on the other hand,
are powered via the USB connection to your PC and includes versatile,
full instrumentation LabView Applications Software.
Model SPI-A-62 THz and SPI-D-62 THz
These two models are designed around our hottest LiTaO3 Pyroelectric crystal.
This dictates using thin material and limits there size to 2 mm square. In addition we add an Organic Black Absorbing Coating that can enhance the response for a good portion of the spectrum. The SPI-A-62 has a voltage responsivity of about 150 kV/W– very high! This helps you measure THz radiant flux down to 100 nW with good signal to noise. The SPI-D-62 incorporates the same detector element but mates it to our USB based digital electronics. Add our LabView Software and you've got a THz Radiometer that is ready to "plug and play."
Model SPI-A-65 THz and SPI-D-65 THz
These two probes incorporate a larger 5 mm diameter LiTaO3
Pyroelectric detector that includes a new THz enhanced metallic coating.
The larger area makes it a little easier to set up and use with your
millimeter sources. They SPI-A-65 has a voltage responsivity of about
120 kV/W and good NEP at 1 nW/(Hz)1/2. The SPI-D-65 is otherwise just
like the SPI-D-62 and includes our powerful LabView Software.
Instrument Features
- SPI-A-65 and SPI-D-65 include a 5 mm diameter detector with our high absorbance metallic coating
- SPI-A-62 and SPI-D-62 include 2 mm square detector with our OB Black Absorbing coating
- Measure from 100 nW to 2 mW
- SM1 threaded input bezel for interchangeable optics and filters
- SPI-A is designed for use with your Lock In Amp
- SPI-D is designed to be powered by your PC through the USB connection
- Cal factor and wavelength correction stored in probe EPROM
- 5 Hz is the optimal chopping frequency for SPI-A probes
- 10 Hz is the required chopping frequency for the SPI-D probes
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