SPECIAL PRODUCTS
Position Sensing Detectors

QUAD
Position Sensing Power & Energy Detectors
MONITORSKEY FEATURES
1. MEASURE, TRACK AND ALIGN
With μm resolution in real time!

2. 4-CHANNEL DETECTORSENERGY DETECTORS

Unique pyrolectric QUADrant detector technology
handles high peak power without saturation

3. FOR CW, PULSED AND HIGH REP RATELASERS

POWER DETECTORSQUAD-4Track Module• QUAD-E: Energy per pulse from μJ to mJ• QUAD-P: Powers from μW to mW

4. FROM UV TO FIR AND THz
Broadband detectors cover the full spectrum, from UV
to Sub-Millimeter wavelengths

HIGH POWER SOLUTIONS

5. LARGE AREA SENSORS
9 mm and 20 mm square detectors

6. FAST USB 2.0 CONNECTION
Ensures full speed tracking

BEAM DIAGNOSTICS

SPECIAL PRODUCTS

OEM DETECTORSTHZ DETECTORSPHOTO DETECTORS

7. INCLUDES APPLICATION SOFTWARE

166

Complete LabView Application Software included,with many features

CONNECTIVITY

QUAD-9-MT-E(9 x 9 mm-For Energy)

QUAD-20-MT-E(20 x 20 mm-For Energy)

QUAD-9-MT-P(9 x 9 mm-For Power)

QUAD-20-MT-P(20 x 20 mm-For Power)

ACCESSORIESSEE ALSOTECHNICAL DRAWINGS

142

LIST OF ALL ACCESSORIES196

APPLICATION NOTESLASER POSITION SENSING DETECTORSStand with Delrin Post
(Model Number: 200428)

Additional 9V Power Supply(Model Number: 200960)

USB Cable(Model Number: 202373)

AND MONITOR

201930SDC-500 DIGITAL OPTICAL CHOPPER

202154

Watch the Introduction video available on ourwebsite at www.gentec-eo.comg
SDC-500 Digital
Optical Chopper (for -P)

Pelican Carrying CasePOSITION SENSING DETECTORSQUADCONFORME

SPECIFICATIONS
20 mJ / 200 mW

MAX POSITION RESOLUTION

1 μm / 10 μm

1 μm / 10 μm

EFFECTIVE APERTURE

9 x 9 mm

20 x 20 mm

ENERGY DETECTORSQUAD-20-MT-E / QUAD-20-MT-P

20 mJ / 200 mW

MONITORS

QUAD-9-MT-E / QUAD-9-MT-P
MAX ENERGY / AVG POWER

MEASUREMENT CAPABILITY
Spectral Range

0.1 - 3000 μm

0.1 - 3000 μm

Min Beam Size at 4.5 mm Øt 10 mm Ø

For -E (Energy sensors)
20 mJ/Channel

0.5 μJ

1.0 μJ

Rise Time (0-100%)

150 μs150 μsMax Repetition Rate

1000 Hz

1000 HzMax Pulse Width

2.5 μsec

2.5 μsec

Sensitivity

1000 V/J

1000 V/J

HIGH POWER SOLUTIONS

20 mJ/Channel

Noise Equivalent Energy

POWER DETECTORSMax Measurable Energy

For -P (Power sensors)
200 mW

200 mW

Noise Equivalent Power

1 μW

2 μW

Rise Time (0-100%)< 0.02 s< 0.02 s

Max Chopping Frequency

50 Hz

50 Hz

Sensitivity

2000 V/W

2000 V/W

Calibration Uncertainty

± 4%

± 4%

Minimum Position Resolution
With QUAD-4Track Monitor-E: 1 μm
-P: 10 μm-E: 1 μm
-P: 10 μm

PHOTO DETECTORSMax Measurable PowerDAMAGE THRESHOLDS
Max Average Power Density (@ 1.064 μm)

100 mW/cm2

100 mW/cm2
50 mJ/cm2

Effective Aperture

9 x 9 mm

20 x 20 mm

SensorPyroelectric

Pyroelectric

Absorber

MTMTDimensions

63.5Ø X 40.6D mm

63.5Ø X 40.6D mm

Weight

181 g

181 g

THZ DETECTORS

50 mJ/cm

Max Energy Density (@ 1.064 μm 10 ns)

2

PHYSICAL CHARACTERISTICS

OEM DETECTORSORDERING INFORMATION
Product Name (Detectors)
Product Number
Product Number

QUAD-9-MT-P

QUAD-20-MT-E

QUAD-20-MT-P

201774

201776201775

201777
SPECIAL PRODUCTS

Product Name (Module)

QUAD-9-MT-E
QUAD-4Track
201517

Speciﬁcations are subject to change without noticea. For optimal performance.

BEAM DIAGNOSTICS* For details, contact your Gentec-EO representative
Catalogue 2017_V2.0.com

167

SPECIAL PRODUCTS

QUAD
MONITORS

QUAD-4TRACKSPECIFICATIONS & FEATURES
QUAD-4Track(Front View)

QUAD-4TRACK
Number of Channels

4Full Scale Ranges (4 Decades) (E / P)

QUAD-4Track(Rear View)

Joulemeter Mode (with QUAD-E)

20 μJ to 20 mJ

Radiometer Mode (with QUAD-P)

200 μW to 200 mW

USB Connection to Computer

YES (USB 2.0 Full Speed)

Power Supply

9VDC

Power On LightYES

Detector Input

DB-25 ConnectorDetector Analog Output

BNC Connector (0-2 V)

Trigger Input (TTL)BNC Connector with LED Indicator

Product Number201517

QUAD DETECTORS
Our large area Pyroelectric Quadrant Detectors provide unique advantages over other position sensing
detectors like Silicon quads or lateral effect photodiodes. They are fast, handle high peak power of pulsed
lasers without saturation and respond to lasers across the spectrum, from UV to Far IR and even THz. The
QUAD-E is intended for use with pulsed sources at up to 1000 Hz, while the QUAD-P is designed for CWand High Repetition Rate (Quasi CW) sources. Both types of detectors can also be used as standalone
units, in an analog mode, for incorporation into your own system application. We can provide a Lemo
pigtail cable for this purpose.

OEM DETECTORSTHZ DETECTORSPHOTO DETECTORSHIGH POWER SOLUTIONSPOWER DETECTORSENERGY DETECTORSThe QUAD-4Track is a Laser Position Sensing system designed to support our unique Pyroelectric Quadrant
Detectors, QUAD-P and QUAD-E. It is a 4-channel microprocessor-based system that measures thevoltage output of each QUAD element and does the math necessary to provide a measurement of the X
and Y displacement of a laser beam or image. It is fast and can be used to track, align and/or measure
movement in real time, with a resolution of just a few microns!

BEAM DIAGNOSTICS

SPECIAL PRODUCTS

ANALOG OUTPUT

168

The analog output of the QUAD-4Track provides voltage that is directly proportional to the pulse energy
or laser power irradiating each QUAD element. When the four voltage outputs are equal, the beam iscentered on the QUAD detector. This provides a very useful tool when setting up our QUAD probes withyour source for optical alignment.

POSITION SENSING DETECTORSQUADMEASUREMENT SCREEN
MONITORS
ENERGY DETECTORSQUAD-4Track includes powerful, stand alone, LabView Software which is used to control the instrument,
process the data, and display X and Y position. It also displays the energy or power of your source andrepetition rate. The large graphic in this screen shows the position of the centroid of the beam and tracks
its movement in real time. The software includes many handy features like: set boundary, zoom (2X to128X), set resolution, data logging, and many more. The green line represents the tracking history.

POWER DETECTORSTRACKING THE BEAM OVER TIMEHIGH POWER SOLUTIONSIn the measurement screen shown on the left, we are tracking the beam stability of a pulsed Nd:YLF laser
at 10 Hz. The resolution was set at 0.001 μm, the boundary is at 20 μm (red circle), and the zoom feature isat 64X. The total energy is 108.5 μJ, the ﬁnal position of the laser is at -8 μm in X and -8 μm in Y. The green
tracking line shows the movement of the laser about the zero position over a few hundred pulses.

PHOTO DETECTORSPOSITION CALIBRATION SCREEN

THZ DETECTORS

We’ve developed a unique position calibration routine which allows you to calibrate our QUAD-4Tracksystem when working with a uniformly round laser beam. It requires the use of a micrometer-driven linear
stage (1-axis only). As you can see from the calibration screen on the left, the procedure involves zeroing
the instrument, moving the QUAD probe to nine discrete positions (+2.000 to – 2.000 mm) and thencapturing the QUAD readings. It then determines correction coefﬁcients (last column) and applies them tothe raw data to arrive at “corrected positions”. The QUAD probe is now calibrated!

OEM DETECTORSDATA LOGGINGSPECIAL PRODUCTS

Another very handy feature is “data logging”. This allows you to set up the QUAD-4Track to follow thedisplacement, energy and/or power of your laser over several minutes, hours or even days. Need tomeasure the “beam steering” of your laser as it warms up? This is how you do it! Need to measure thebeam displacement vs laser repetition rate or energy level? Data logging will help you measure it!

BEAM DIAGNOSTICS

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