The government intends to negotiate a sole-source contract with Stable Laser Systems for a Stable Optical Cavity Absolute Reference System, as its products uniquely meet essential requirements including simultaneous 493 nm and 650 nm operation. This is a notice for information only, not a request for competitive proposals, but responsible sources may submit capability statements for consideration. The system includes a cylinder cavity assembly, vacuum housing, zero-crossing temperature measurement, temperature controller, and ion pump unit. The government anticipates award on or before 30 September 2026. No budget amount or performance location is specified.