The Department of Commerce, specifically the National Institute of Standards and Technology (NIST), is seeking responses for a Sources Sought notice regarding the procurement of a high-performance Optical Spectrum Analyzer (OSA). The OSA must meet stringent specifications, including the ability to accurately measure the wavelength and spectrum of optical sources, with a spectral range of 250 nm to 2500 nm and a wavelength accuracy of ≤ 0.005 nm. This equipment is crucial for improving the accuracy of wavelength scale calibrations of monochromators, which are essential in various analytical applications. Interested vendors should submit their responses, including company details and capabilities, to the primary contact, Cielo Ibarra, at cielo.ibarra@nist.gov, by 9:00 a.m. Eastern Time on August 9, 2024. Please note that this notice is not a request for proposals, and no contract will be awarded as a result of this notice.