The Department of Defense, specifically the Department of the Air Force, is seeking to award a sole source contract for an ultrastable laser optical cavity to Stable Laser Systems Inc, a small business located in Boulder, Colorado. The required optical cavity must achieve a frequency drift of less than 13 kHz per day and meet specific technical standards, including a wavelength range of 750 - 1050 nm, a finesse of at least 5000, and various vacuum and temperature stabilization features. This procurement is critical for applications requiring high precision in optical measurements, and the government has determined that Stable Laser Systems Inc is the only responsible source capable of fulfilling these requirements. Interested parties may contact Ms. Susan D. Ulma at susan.ulma@us.af.mil for further information, although this notice is not a request for competitive quotes, and responses must be submitted by the specified deadline to be considered.