TY - RPRT TI - Nonlinear post-compression to sub-20 fs using a single-stage multipass cell filled with ambient air AU - Feng, Chengyong [Univ. of Rochester, NY (United States). Lab. for Laser Energetics] AU - Bromage, Jake [Univ. of Rochester, NY (United States). Lab. for Laser Energetics] (ORCID:000000030720093X) PY - 2026 DO - 10.1364/oe.588406 UR - https://www.osti.gov/biblio/3024400 ID - 3024400 ER -