The Department of Defense (DoD) is seeking proposals for the development of a new type of laser designation pulse code, or other technology, to improve the countermeasure resiliency of laser guided weapons. The objective is to provide robust defense against active laser countermeasures, commonly referred to as "spoofing." The ideal code should maintain track on the original code even when measured by an adversary in real-time, not result in any performance loss compared to simple code options, not require cumbersome logistics for employment, be backwards compatible with other common codes, primarily require software modifications, and have mathematical efficiencies in code generation and decoding. The Air Force is also open to considering other approaches for laser designators or seekers that may provide high-value benefits. The project will progress through Phase II, where a system design and prototype will be developed and tested in laboratory and field environments. Successful demonstration will lead to the transition of the technology to update fielded munitions. The solicitation is open until October 18, 2023, and more information can be found on the DoD SBIR 23.3 BAA page on grants.gov.