This is a sources sought notice from NIST for market research to identify vendors capable of providing a Narrow Linewidth Laser. No solicitation is currently available, and the government will not pay for any information submitted. The notice aims to determine if a small business set-aside is possible, but all responsible sources are encouraged to respond. The applicable NAICS code is 334516, with a small business size standard of 1,000 employees. No budget, submission timeline, or performance location are specified.