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Photonics West 2025: Fraunhofer IOF presents VCSEL-based photon source for quantum-encrypted communication
Ultra-compact light source for quantum encryption
The concept of using strongly attenuated, randomly polarized light pulses for secure quantum communication has been around since the mid-1980s. Most commercial light sources for quantum communication are still based on this idea today. The biggest challenge here is to generate indistinguishable and…