Amendment to Solicitation for High Finesse Dual Wavelength Reference Cavity

The Department of Commerce has issued a Special Notice for an Amendment to Solicitation for a High Finesse Dual Wavelength Reference Cavity, posted on May 20, 2025. The amendment addresses technical clarifications for a specialized optical cavity system intended for the National Institute of Standards and Technology (NIST) Physical Measurement Laboratory. Specifically, the notice provides detailed responses to contractor questions regarding input signal specifications, fiber input requirements, and photodetector performance parameters. The amendment clarifies that the system requires a fiber input to a collimator assembly module, with contractors responsible for mode matching light into optical cavities and generating specific locking signals. The notice also specifies technical details about photodetector bandwidth and noise requirements.

The primary objective of this solicitation is to procure a sophisticated reference cavity system for spectroscopic research, targeting precise measurements with cesium and ytterbium atomic gases at specific wavelengths. Contractors must submit electronic quotations by May 27, 2025, with evaluation criteria prioritizing technical capability, followed by past performance and pricing. Eligibility requires vendors to be registered in the System for Award Management (SAM) and capable of delivering a new system meeting stringent technical specifications, including high-finesse optical cavities with >100,000 finesse at 555.8 nm and 894.6 nm wavelengths. The procurement is structured as a full and open competition using simplified acquisition procedures, with the intent to award a single firm-fixed-price purchase order. Successful contractors must provide a complete system with pre-aligned components, integrated photodetectors, and meet specific performance parameters such as minimal frequency drift and a comprehensive one-year warranty.