This product is a single photon detector with independent intellectual property rights. The core component is the domestically produced InGaAs/lnPAPD with independent intellectual property rights, which has the characteristics of high efficiency, low noise, and high stability. It plays an indispensable role in the field of single photon level weak signal detection. It is the core equipment for quantum signal optoelectronic conversion.
This product operates in Geiger gating mode, using techniques such as gate modulation, avalanche signal discrimination, and dead time suppression to reduce the background noise of the product while ensuring high efficiency. At a trigger rate of 1.25GHz, the maximum detector efficiency is ≥25%, the dark counting rate is as low as 300cps, and the afterpulse probability is as low as 1% @ dead time 200ns. It supports user configuration of parameters such as bias, dead time, discrimination threshold, custom scan delay range, and supports detection pulse output function. Built in Time Data Conversion (TDC) function, providing two external acquisition channels with a resolution as low as 50ps.
-High speed door control, up to 1.25GHz
-Ultra low dark counting rate
-High detection efficiency, low post pulse
-Low temperature refrigeration, constant temperature control
-High precision TDC function with a resolution as low as 50ps
522KB
| TECHNICAL PARAMETER | TECHNICAL INDEX |
| Product mode | QCD-500A |
| Wavelength range | 900nm~1700nm |
| Gated frequency | 1.25GHz |
| Detection efficiency(typical value) | 25% |
| Dark count rate(typical value) | 1.5kcps |
| Afterpulse probability @ Dead time 200ns | 2.5% |
| Dead time range | 10ns~10μs |
| Time jitter | ≤200ps |
| Detection pulse leve | LVTTL |
| Detection pulse width | 15~30ns |
| Detection pulse output connector | SMA |
| Optical connector | FC/UPC |
| Cooling time | <3min |
| TDC accuracy | 50ps |
| Peak power | 42W |
| Input voltage | 12V |
| Dimensions(W*L*H) | 278mm*240mm*90mm |
-Quantum Key Distribution (QKD)
-Laser ranging
-Weak light source detection
-Atmospheric and water environment detection
-Non destructive property analysis
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