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Single Photon Counting Module

COUNT

®

-Series User Manual

Table of Contents

Introduction 2
Mounting the Count

Handling single photon counting modules

Heat dissipation

Gating function and TTL output

Optical fiber connection

Electrical connections (rear side)

Powering up the module

Optimizing performance

Spectral response

Timing resolution

Correction factor

Technical specifications for COUNT

Technical sSpecifications for COUNT

Technical specifications for COUNT

Absolute maximum ratings

10

Interface information

10

Individual module test data

10

ESD information

10

Safety

10

RoHS compliance

10

10

Product number designations

11

3

Detectors

Germany and Other Countries

Laser Components Germany GmbH
Tel: +49 8142 2864 – 0
Fax: +49 8142 2864 – 11
[email protected]

www.lasercomponents.com

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Summary of Contents for COUNT Series

Page 1: ...4 Optimizing performance 4 Performance 5 Spectral response 5 Timing resolution 5 Correction factor 6 Technical Data 7 Technical specifications for COUNT module 7 Technical sSpecifications for COUNT BLUE module 8 Technical specifications for COUNT NIR module 9 Absolute maximum ratings 10 Interface information 10 Individual module test data 10 ESD information 10 Safety 10 RoHS compliance 10 Warranty...

Page 2: ...utput The optional FC connector provides a convenient method for connecting the module to the sample using a multimode optical fiber Mounting the Count modules The COUNT can be either mounted from the front side or by using the dedicated mounting holes on the base plate Front side Single Photon Counting Module COUNT Series User Manual The front side of the COUNT provides two mounting options 1 a C...

Page 3: ...r mounting the module onto a suitable heat sink e g an optical table Gating function TTL output The COUNT module features a gating input provided as standard This can be used for viewing a signal that occurs only in a small timeframe window or in applications with very weak signals and higher background light The output of the module is disabled when a TTL low level is applied to the gate input Ap...

Page 4: ...which the sensor will be cooled down to its operating temperature NOTE the COUNT will not generate any output signal until the operating temperature has been reached Optimizing performance The COUNT shows best performance if the light is focussed to a small spot 50 µm diameter in the center of the sensor area Please also see Fig 2 of the COUNT datasheet Mounting the COUNT on a suitable x y z trans...

Page 5: ... timing resolution the light should be focused to a small spot 50 µm in the center of the sensor Off center focusing or overfilling the sensor area might lead to an increased FWHM of the photon timing resolution 3 Count rate the FWHM of the photon timing resolution increases at high count rates Especially at count rates 1 million counts second the FWHM may be double the value at low count rates Th...

Page 6: ...be used to correct the non linearity especially at high light levels Rmeasured Rphoton 1 Rmeasured TD The following two figures demonstrate the effect of the dead time on the measured count rate and its correction factor Correction Factor R photon Rmeasured 1 1 Rmeasured TD Fig 2 Measured count rate vs actual photon rate for a dead time of 43 ns Fig 3 Correction factor vs photon rate for a dead ti...

Page 7: ...65 ns ns TTL output pulse length 15 17 ns TTL output pulse amplitude into 50 Ohm 3 V Delay between photon impact and TTL pulse 30 ns Supply voltage 11 5 12 0 12 5 V Supply current switch on 0 8 A Supply current operation at 1 Mcps 0 2 A 1 Specifications valid for modules without FC connector 2 The active area of the integrated Si APD is larger than 100 µm The FC version is optimised for optical fi...

Page 8: ... output pulse length 15 17 ns TTL output pulse amplitude into 50 Ohm 3 V Delay between photon impact and TTL pulse 30 ns Supply voltage 11 5 12 0 12 5 V Supply current switch on 0 8 A Supply current operation at 1 Mcps 0 2 A 1 Specifications valid for modules without FC connector 2 The active area of the integrated Si APD is larger than 100 µm The FC version is optimised for optical fibers with co...

Page 9: ...odule Gating off enable module 15 60 20 65 ns ns TTL output pulse length 15 17 ns TTL output pulse amplitude into 50 Ohm 3 V Delay between photon impact and TTL pulse 30 ns Supply voltage 11 5 12 0 12 5 V Supply current switch on 0 8 A Supply current operation at 1 Mcps 0 2 A 1 Specifications valid for modules without FC connector 2 The active area of the integrated Si APD is larger than 100 µm Th...

Page 10: ...robability ESD Information Modules should only be handled at an ESD safe work station Safety The COUNT Series contains a high voltage power supply Users may be injured if the case has been opened All internal settings are pre set there are no user adjustments Units that appear defective or have suffered mechanical damage should not be used because of possible electrical shorting of the high voltag...

Page 11: ...t and documentation Of course we also appreciate good news If you have obtained exciting results with one of our systems please let us know and where appropriate mention us in your publications Retraction of old devices Waste electrical products must not be disposed of with household waste This equipment should be taken to your local recycling center for safe treatment WEEE Reg No De96457402 Produ...

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