Fig. 5: Nonlinear optical response of lysed RBCs (free hemoglobin) in water.
From: Optical force-induced nonlinearity and self-guiding of light in human red blood cell suspensions
a Output beam size as a function of input power through the Hb solutions for four different concentrations. The RBC concentrations for the four curves (Hb1-Hb4) are 2.4, 5.1, 8.6, and 15.0 million cells per mL. Nonlinear self-focusing of the beam occurs at ~100 mW for high concentrations of Hb, but it subsequently expands into thermal defocusing rings at high powers. b–e Typical output transverse intensity patterns taken for the self-trapped beam (b, d) and thermally expanded beam (c, e) for low (d, e) and high (b, c) concentrations
