The photon pair source that survived a rocket explosion

TL;DR

This paper reports on a rugged photon pair source embedded in a nanosatellite that survived a rocket explosion, demonstrating its resilience and potential for space-based quantum communication.

Contribution

It introduces a novel rugged design for quantum optical sources capable of surviving extreme environments like rocket failures.

Findings

Source remained fully operational after the explosion

No degradation in brightness or polarization correlation observed

Demonstrates feasibility of rugged quantum systems in space environments

Abstract

We report on the performance of a compact photon pair source that was recovered intact from a failed space launch. The source had been embedded in a nanosatellite and was designed to perform pathfinder experiments leading to global quantum communication networks using spacecraft. Despite the launch vehicle explosion soon after takeoff?, the nanosatellite was successfully retrieved from the accident site and the source within it was found to be fully operational. We describe the assembly technique for the rugged source. Post-recovery data is compared to baseline measurements collected before the launch attempt and no degradation in brightness or polarization correlation was observed. The survival of the source through an extreme environment provides strong evidence that it is possible to engineer rugged quantum optical systems.