L3Harris Technologies has been granted a patent for a quantum communications system that includes a transmitter node, receiver node, and quantum communications channel. The system utilizes waveplates to alter polarization states of pulses for secure communication. GlobalData’s report on L3Harris Technologies gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on L3Harris Technologies, AR/VR head-up displays was a key innovation area identified from patents. L3Harris Technologies's grant share as of April 2024 was 73%. Grant share is based on the ratio of number of grants to total number of patents.

Quantum communications system with waveplates for altering polarization of pulses

Source: United States Patent and Trademark Office (USPTO). Credit: L3Harris Technologies Inc

A recently granted patent (Publication Number: US11962689B2) discloses a quantum communications system that includes a transmitter node, a receiver node, and a quantum communications channel connecting the two. The transmitter node consists of a pulse transmitter, a pulse divider, and at least one first waveplate to alter the polarization state of pulses. On the other hand, the receiver node comprises at least one second waveplate, a pulse recombiner, and a pulse receiver. The system is designed to operate with single photon detectors and staged birefringent crystals for pulse division and recombination, generating temporally modulated photons for communication through various optic channels.

Furthermore, the patent also covers a quantum key distribution (QKD) system within the communications system, where the transmitter node generates quantum pulses divided into time bins, and the receiver node recombines them for secure communication. The method of operating the system involves generating quantum pulses, dividing them, altering their polarization state, recombining them, and detecting them using single photon detectors. The system can operate over different optic channels like fiber optic, free space optic, or underwater optic, generating orthogonally modulated photons for enhanced security in quantum key distribution protocols. The patent emphasizes the use of staged birefringent crystals for pulse manipulation and recombination, ensuring efficient and secure quantum communication.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.