This is a notice of a proposed sole-source contract, not a request for competitive bids, for High Quantum Efficiency Balanced Homodyne Detectors. The government intends to award the contract to Noisy Labs GmbH in Hamburg, Germany, as it is determined to be the only known vendor that meets the specific technical requirements. The requirement is driven by the need for equipment uniformity with existing Noisy Labs hardware in a complex quantum network setup. The government anticipates making the award on or before February 27, 2026. While not a solicitation, responsible sources may submit a capability statement for consideration.