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Technical specifications for COUNT
®
BLUE module
Parameter
Min.
Typ.
Max.
Unit
Spectral range
350
1000
nm
Dark count rate
COUNT
®
-10B
COUNT
®
-20B
COUNT
®
-50B
COUNT
®
-100B
COUNT
®
-250B
10
20
50
100
250
Counts/s
Counts/s
Counts/s
Counts/s
Counts/s
Photon detection efficiency Pd
1
at:
405 nm
520 nm
670 nm
50
60
50
55
70
55
%
%
%
Pd variation with FC-connection
5
%
Pd variation at constant temperature
1
%
Dark count rate variation at constant temperature
5
%
Active area diameter (nominal)
2
100
µm
Timing resolution
3
1000
ps
Afterpulsing probability
4
0.2
%
Dead time
42
45
48
ns
Gating input voltage
Gating on (=disable module)
Gating off (=enable module)
TTL low (<0.5)
TTL high (>2.4)
V
V
Gating input response time
Gating on (=disable module)
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. The FC-version is optimised for optical fibers with core diameter <105 µm.
The pre-aligned GRIN lens focuses the light onto a spot of < 70 µm diameter in the centre of the detector. The NA of the fiber used with the
module is recommended to be ≤ 0.15. For fibers with a NA ≤ 0.29 and a core diamenter of ≤ 105 μm special FC-versions are available
for wavelengths ≥ 500 nm.
3
Timing resolution depends on count rate and wavelength.
4
Defined for a time interval from 0 to 500 ns.
Single Photon Counting Module
COUNT
®
-Series User Manual
Detectors
Germany and Other Countries
Laser Components Germany GmbH
Tel: +49 8142 2864 – 0
Fax: +49 8142 2864 – 11
[email protected]
www.lasercomponents.com
