概述
A single-photon counter is a high-precision photoelectric measurement device capable of detecting and recording individual photon signals, which can be called a "precision radar" in the field of light detection. Through special photoelectric conversion and signal processing technologies, it converts light signals as weak as the single-photon level into recognizable electrical signals, enabling quantitative analysis of extremely weak light.
Core advantages:
- Ultra-high sensitivity: It breaks through the limits of traditional photoelectric detection and can directly respond to single photons, making it suitable for extremely weak light scenarios such as biological fluorescence, quantum communication, and deep space exploration.
- Accurate counting capability: Through pulse discrimination and time tagging technologies, it accurately records the number of photons arriving and their time information, providing data support for precision measurements.
Typical application fields:
- Quantum information science (quantum key distribution, quantum entanglement measurement)
- Biomedical imaging (single-molecule fluorescence detection, flow cytometry)
- Environmental monitoring (trace gas analysis, weak spectral detection)
- National defense and aerospace (remote sensing imaging, lidar ranging)
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