Expanding the scope of optical nonlinearity
DL Andrews - The European Conference on Lasers and Electro …, 2015 - opg.optica.org
Optical nonlinearity is nothing new. In 1961–within a single year of the laser age dawning–
the first such observations (of two-photon induced fluorescence) were recorded [1], fulfilling …
the first such observations (of two-photon induced fluorescence) were recorded [1], fulfilling …