GSPD series single photon detector modules are based on InGaAsP/InP single photon avalanche detector design. It adopts the form of metal shell envelope and can be used for three-dimensional laser radar imaging detection, active laser ranging, Time coherent single photon detection, biomedical transient fluorescence spectroscopy detection and other fields.
Main parameters of the detector
Indicator name | Typ |
Response spectral range(μm) | 0.95 ±0.05~1.25 ±0.05 |
Effective photosensitive surface diameter(μm) | 40 |
dead time(μs) | 0.05 - 100 |
Dead time adjustment accuracy(ns) | 5 |
Optical coupling method | space light |
Maximum single photon detection efficiency(%) | 40@1064nm |
dark count rate(Hz) | ~ 800@10% detection efficiency, -40℃, 1μs dead time |
Time resolution(ps) | < 200@20% detection efficiency |
Built-in TCSPC time resolution | 36ps or 48ps and its integer square value (configurable) |
operating mode | Free running / external or internal gated (configurable) |
Working temperature(℃) | 0~40 |
Dimensions(mm) | 40(L)×40(W)×36.5(H) |
Mechanical parameters
The detector module adopts a metal shell envelope with an outer envelope size of 40mm (L) × 40mm(W)×36.5mm (H). The mechanical mounting holes are located on the bottom of the detector module and are four M2.5 screw holes.
Optical parameters
The front end of the detector module uses a TO8 sapphire optical window. The diameter of the light-passing area of the sapphire light window is φ9mm and the thickness is 0.5mm. The overall relative position and structural dimensions of the optical window and module are as follows As shown in the figure.
Electrical properties
The electrical interface adopts the military standard J63A interface, which is used for power, data, communication control, and trigger control.
Interface parameters | Illustrate | Note |
Avalanche pulse output signal level | 1MΩ load: LVTTL 3.3V 50Ω load: high level ≥1.5V, low level ≤0.4V | Pulse direction configurable, leading edge valid |
Avalanche pulse output signal width | 12.5ns to 15ns |
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Input/output gate voltage | LVTTL 3.3V |
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External input gate minimum pulse width | 10ns |
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Control protocol | 3.3VUART，115200bps，No checksum |
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Built-in TCSPC Communication protocols and interfaces | 4 Byte binary output 3.3VUART / SPI / LVDS，Max100 Mbps |
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Laser enable trigger Trigger In | LVTTL 3.3V，pulse width≥50ns，rising edge ≤200ps，Jitter≤100ps | When used as a laser timing synchronization signal, the rising edge is valid. When used as a gate control, the high level is valid. |
Power supply | DC 5~12V，Max1A | Related to cooling temperature |
InGaAsPInP single photon detector module.pdf
