BAE Systems has developed a compact laser cooling system using a split liquid cooled heat exchanger. The system efficiently cools different parts of the laser by directing coolant to areas needing lower temperatures first. This innovation allows the system to handle thermal loads of up to 800 W in a compact space. GlobalData’s report on BAE Systems 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 BAE Systems, AR/VR head-up displays was a key innovation area identified from patents. BAE Systems's grant share as of January 2024 was 51%. Grant share is based on the ratio of number of grants to total number of patents.

Compact laser cooling system using split liquid cooled heat exchanger

Source: United States Patent and Trademark Office (USPTO). Credit: BAE Systems Plc

A recently granted patent (Publication Number: US11888287B2) discloses a laser cooling system designed to efficiently cool a compact laser system. The system comprises a first liquid cooled heat exchanger connected to a pair of heat spreaders for mounting pump diode arrays, along with a pair of thermoelectric coolers for independent thermal control. A second liquid cooled heat exchanger is also included, connected to gain medium crystals. The system features a split liquid cooled heat exchanger design, occupying a volume of less than 45 cubic inches, with the ability to handle a thermal load of about 800 W. The coolant temperature entering the system is maintained at around 20°C, with the coolant exiting at less than 30°C.

The method outlined in the patent involves cooling the pump diode arrays and gain medium crystals using the thermoelectric coolers and heat spreaders, respectively. The system's compact design and efficient cooling capabilities make it suitable for various laser applications. The method ensures precise thermal control of the components, with the coolant temperature carefully monitored throughout the process. The split liquid cooled heat exchanger design allows for effective heat dissipation while maintaining a small footprint. With a thermal load capacity of 800 W and coolant temperatures optimized for efficient cooling, this laser cooling system represents a significant advancement in laser technology.

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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.