NIST researchers have developed a new measurement protocol called frequency correlated bi-photon spectroscopy, designed to analyze the properties of distant objects using linked pairs of light particles. This technique was detailed in a 2013 study published in *Laser Physics Letters* and represents a specialized method developed by the National Institute of Standards and Technology. While it serves as a technical protocol rather than a formal industry standard, it establishes a way to perform quantum-based remote sensing without placing heavy equipment at the target site.
The method allows for spectral analysis by sending one photon to the object and measuring its partner locally, ensuring security because neither beam alone reveals the full data. It uses coincidence counting to reconstruct the object’s profile, which is particularly useful when privacy is required at the remote location. Although the technique is fully described in the 2013 publication, the article does not provide a specific timeline for broader commercial implementation or standardization.
Source: https://www.nist.gov/itl/correlated-photon-pairs-are-used-measure-spectra-remote-objects
Keywords: bi-photon spectroscopy, coincidence counts, up-conversion detector
