Figure 5.

a) The principle of two-photon absorption. b) Schematic illustration of the experimental setup for two-photon bioprinting along with a zoomed description of focal plane and distribution of light intensity in the laser focus of a Gaussian beam is shown. Reprinted with permission from American Institute of Physics. c) The cross section of TPL-bioprinted mouse paw bone imaged using scanning electron microscopy and intricate contours within the structure arose from the bioprinting process. Image provided by Elise Morgan and Alice White, Department of Mechanical Engineering, Boston University, Boston, USA.