The optical absorption of pure liquid water in the 300–700-nm region has been measured by use of a long (1.5-m) path-length cell. The absorption spectrum coincides well with the edge of previous data in the 200–320-nm region and provides reliable data in the 320–420-nm region that has until now been a region of considerable unreliability. The data obtained for the 420–700-nm region agree quite well with the means of the existing literature in that well-studied region. The absorptions in the 550–700-nm region show evidence for the overtones and combination tones of the well-known OH stretching frequency at 3500 cm<sup>−1</sup>.
© 1999 Optical Society of America
Ronald A. J. Litjens, Terence I. Quickenden, and Colin G. Freeman, "Visible and Near-Ultraviolet Absorption Spectrum of Liquid Water," Appl. Opt. 38, 1216-1223 (1999)