The National Institute of Standards and Technology (NIST) is conducting market research for two Mid-Wave Infrared Distributed Feedback (DFB) laser systems, each with specific wavelength requirements (2700 nm and 3000 nm). The lasers must include a thermoelectric cooler, thermistor, anti-reflection coated window, and lens cap, and be fully assembled and optically aligned. This is a sources sought notice for information-gathering purposes only, not a solicitation, and no contract will be awarded from this notice. No specific budget amount or performance location is mentioned in the description. Respondents should submit their capability information as soon as possible, but no specific submission deadline is provided.