TY - RPRT TI - Fringe-free, background-free, collinear third-harmonic generation frequency-resolved optical gating measurements for multiphoton microscopy. AU - Rebecca Chadwick AU - Erik Spahr AU - Jeff A Squier AU - Charles G Durfee AU - Barry C Walker AU - David N Fittinghoff PY - 2006 DO - 10.1364/ol.31.003366 UR - https://pubmed.ncbi.nlm.nih.gov/17072425/ ID - 17072425 ER -