The Department of Defense, specifically the U.S. Army Engineer Research and Development Center (ERDC), intends to procure a Pulse Duration Measurement Autocorrelator Device for femtosecond laser pulse diagnostics. This specialized instrument is required to characterize femtosecond pulses generated by a laser operating in the spectral range of 630 nm to 5000 nm, with specific capabilities to function as both an intensity and interferometric autocorrelator. The procurement is critical for ongoing research and development efforts at the Geospatial Research Laboratory (GRL), which relies on precise pulse-width measurements calibrated to National Institute of Standards and Technology (NIST) standards. Interested vendors must submit capability statements and past performance information to Ethel D. Grant at ethel.d.grant@usace.army.mil by 2:00 PM CST on April 16, 2025, as the government intends to proceed with a sole source acquisition from Applied Physics and Electronics, Inc.