THORLABS SPDMH2, Operation Manual, Page: 14 / 22

Page 10
MTN028160-D02
SPDMHx Series 5 Appendix
5 Appendix
5.1 Technical Data
Item # SPDMH2 SPDMH2F SPDMH3 SPDMH3F
Detector
Detector Type Si APD
Wavelength Range 400 nm - 1000 nm
Diameter of Active Detector
Area (nominal)
1
100
m
m
Typical Photon Detection Effi-
ciency (PDE)
2
10% @ 405 nm
50% @ 520 nm
70% @ 670 nm
60% @ 810 nm
PDE Variation at Constant Tem-
perature (Typ)
~ 1% ~ 5% ~ 1% ~ 5%
Count Rate (Max) 20 MHz
Timing Resolution (Typ) 1000 ps
Dark Count Rate (Max) 100 Hz 250 Hz
Dead Time (Typ) 45 ns
Output Pulse Width @ 50 Ω
Load
15 ns (Typ); 17 ns (Max)
Output Pulse Amplitude @ 50 Ω
Load
TTL High (Typ)
3 V
Trigger Input TTL Signal
3
Low (closed)
High (open)
0.5 V
2.4 V
Trigger Input Response Time
Closing Signal
Opening Signal
15 ns (Typ) to 20 ns (Max)
60 ns (Typ) to 65 ns (Max)
Afterpulsing Probability 0.2% (Typ)
Delay between Photon Impact
and TTL Pulse
30 ns (Typ)
Input Fiber Specifications
Fiber Connector FC/PC Connector FC/PC Connector
Input Fiber Core Diameter (Max)
<105
m
m <105
m
m
Numerical Aperture NA 0.29 NA 0.29
General
Connector Free Beam FC Fiber Connector Free Beam FC Fiber Connector
Power Supply ±12 V, 0.8 A
Power Supply for operation @
1MHz
± 12 V, 0.2 A
Operating Temperature Range
4
10 to 40 °C
Storage Temperature Range -20 °C to 70 °C
Dimensions (W x H x D)
105.6 x 40.1 x
76.0 mm
3
(4.16'' x 1.58'' x
2.99'')
116.0 x 40.1 x
76.0 mm
3
(4.57'' x 1.58'' x
2.99'')
105.6 x 40.1 x
76.0 mm
3
(4.16'' x 1.58'' x
2.99'')
116.0 x 40.1 x
76.0 mm
3
(4.57'' x 1.58'' x
2.99'')
Weight
5
315 g 327 g 315 g 327 g