THZ-B
THZ-B Detectors and T-Rad Modules
KEY FEATURES
1. RELATIVE MEASUREMENTS FROM
0.1 TO 30 THz Broadband, room temperature operation, easier to
use and less expensive than a Golay cell
2. MEASURE POWER FROM nW TO mW
With state of the art pyroelectric sensors, measure down to 100 nW
with 2 nW resolution
3. USE WITH T-RAD THZ MODULE OR
T-RAD-ANALOG POWER MODULE
Each head can be connected to an oscilloscope using the analog
power module (T-Rad-Analog) or directly to a PC with the digital
power module (T-Rad)
4. SEVERAL SENSOR SIZES AVAILABLE
Choice of 5 mm and 9 mm diameter
5. CALIBRATED AT 0.63 µm
All THz detectors are calibrated at a single wavelength (0.63 µm)
and include a typical wavelength correction data from 0.25 to 440
µm. They are used for relative measurements outside that range.
6. SDC-500 OPTICAL CHOPPER
All THZ-B detectors require the use of an optical chopper, like our
SDC-500, to sync the signal at either 5 Hz (DA models) or 25 Hz
(DZ models)
7. USER-FRIENDLY SOFTWARE WITH MANY
FEATURES (WITH T-RAD MODULE)
Strip Chart, Histogram, Full Statistics, Tuning Needle with min/max
indicators and Data Logging
SPECIFICATIONS
THZ5B-BL
THZ9B-BL
MAX AVERAGE POWER
20 mW
20 mW
EFFECTIVE APERTURE
5 mm Ø
9 mm Ø
COMPATIBLE MODULES
T-Rad and T-Rad-Analog
T-Rad and T-Rad-Analog
MEASUREMENT CAPABILITY
With T-Rad
With T-Rad-Analog
With T-Rad
With T-Rad-Analog
Spectral Range a
Frequency
0.1 - 30 THz
0.1 - 30 THz
Wavelength
3000 - 10 µm
3000 - 10 µm
Max Measurable Power
20 mW
43 µW
20 mW
150 µW
Noise Equivalent Power (NEP)
5 nW
1.0 x 10-9 W/(Hz)½
50 nW
3.0 x 10-9 W/(Hz)½
Rise Time (0-95%)
≤ 0.2s
≤ 0.2s
Sensitivity (Typical)
N/A
70 kV/W
N/A
20 kV/W
Chopping Frequency b
25 Hz
5 Hz
25 Hz
5 Hz
DAMAGE THRESHOLDS
Max Average Power Density (@ 1064 nm)
10 mW/cm2
10 mW/cm2
PHYSICAL CHARACTERISTICS
Effective Aperture
5 mm Ø
9 mm Ø
Sensor
Pyroelectric
Pyroelectric
Absorber
BL
BL
Dimensions
66.0Ø x 46.5D mm
66.0Ø x 46.5D mm
Weight
227 g
227 g
ORDERING INFORMATION
With T-Rad
With T-Rad-Analog
With T-Rad
With T-Rad-Analog
Product Name (including stand)
THZ5B-BL-DZ
THZ5B-BL-DA
THZ9B-BL-DZ
THZ9B-BL-DA
Product Number
202299
202298
202301
202300
Specifications are subject to change without notice
a. Projected Spectral Range.
From 10 to 440 µm, spectrometer measurement. From 440 to 3000 µm, relative measurement only. This spectral range is subject to change.
b. SDC-500 Digital Optical Chopper sold separately.
T-Rad
The T-Rad is a microprocessor-based digital radiometer that includes a 12-bit ADC
and unique DSP Lock-In Software. It is powered by a USB connection, which also
acts as a Virtual COM port. When a THZ-B Terahertz Pyroelectric detector is
plugged into the T-Rad module, the module reads the content of the head’s
EEPROM, which identifies the detector and provides calibration and wavelength
correction data. The LabView Software supplied with the device makes it very easy
to set up the radiometer, measure a THz or broadband source and record data. The
software is compatible with Windows XP, VISTA and 7.
SPECIFICATIONS & FEATURES
INSTRUMENT CONTROL AND STRIP CHART
Instrument controls and the radiant power measurement are always visible, making
it easy to change the radiometer settings, no matter which display tab is selected.
Instrument controls include: Range, Filter Tau, Batch Size, Data Collection Mode,
Reset Options, and a Null button for background cancellation.
In addition, there are more set up and operation status indicators including: detector
Rv, Wavelength, Frequency (actual), Locked and Frequency in Range lights. The
Strip Chart displays the Radiant Power measurement in Watts, either continuously
or by the batch. Select full scale, auto scale or use our manual scaling option.
INSTRUMENT CONTROL AND TUNING NEEDLE
The “TUNE” tab selects the very useful “Tuning Needle” display. This is a simulated
analog meter whose speed is determined by the “filter tau” setting. It is expected to
be used during the set-up of a radiometer with a source. The “tau” value is usually
set to a small value when aligning the probe to the source
(i.e. when peaking the reading). There is a button control to select “full scale”, “min
-max” or “reset”. In the “min-max” mode, the indicators are “blue” for the minimum
power and “red” for the maximum power.
INSTRUMENT CONTROL AND STATISTICS
In the “Statistics” tab there are 4 large windows that contain the statistics for the
selected batch, including: Minimum, Maximum, Standard Deviation and Mean,
expressed in Engineering Notation. Standard Deviation can be displayed in Watts
or as a % that is user-selectable. There is also a window that shows the bandwidth
of the Digital Band Pass Filter based on the user selected “Filter Tau” (0.100 to
100 seconds). A lower time constant is helpful when setting up, and a longer one
when making measurements, especially on the lower ranges of the instrument.
THZ-B-DA DETECTOR AND OSCILLOSCOPE
Here is a basic analog set up that would be useful if the optical power of the source
was about 5 µWor greater. The output of the THZ5B-BL-DA detector would be
approximately 600 mV @ 5 Hz chopping frequency, giving plenty of signal for an
oscilloscope. Simply read the voltage output and divide by the Rv factor (V/W) of the
detector to measure the intensity of the source in Watts. Also consider applying a
wavelength correction factor under certain circumstances.
THZ-B-DA DETECTOR AND LOCK-IN AMPLIFIER
This is another analog set-up option that we recommend if you have to measure very
low power levels (i.e. less than 5 µW) where the signal may be buried in the broadband
noise. The voltage output of the analog THZ-B-DA detector, powered by our T-Rad-
Analog, is routed to the Lock-In Amplifier input, and the Sync Output of our SDC-500
Chopper is connected to the reference input. The Lock-In Amplifier will lock on the
chopping frequency and you can dial in a long integrating time and measure a very
low RMS voltage. The voltage divided by our Voltage Responsivity (V/W) equals the
power of the source.
THZ-B-DZ DETECTOR AND T-Rad MODULE
Although analog solutions are available, for simplicity, convenience and sensitivity,
we recommend you choose our THZ-B-DZ detectors and the T-Rad Digital Radiometer.
Our unique DSP Lock-In Amplifier software provides a function much like the Analog
Lock-In, but is so much easier to use. It also addresses thermal drift of the sensor and
allows you to display the power measurement and complete statistics directly in digital
and graphic formats. Set the range, null the background, set the filter tau (bandwidth)
and make the measurement. It’s that easy!
商品属性 [最大功率] 20 mW [有效面积] 5 mm Ø [光谱范围] Frequency:0.1 - 30 THz Wavelength:3000 - 10 µm [噪音等效功率] With T-Rad:5 nW With T-Rad-Analog:1.0 x 10-9 W/(Hz)½ [灵敏度] With T-Rad:N/A With T-Rad-Analog:70kv/W