The National Institute of Standards and Technology (NIST) is conducting market research to identify vendors capable of supplying a Laser Linewidth Characterization Suite. This is a sources sought notice, not a solicitation, and no contract will be awarded from this announcement. Responses must be submitted via email to the Contracting Officer by the date and time specified in the notice. The government will use the results to determine if a small business set-aside is possible, and all responsible sources, including large and small businesses, are encouraged to respond. The location for performance is not specified, and no budget amount is provided.