= Gabriel Weinreich
{c}
{tag=Physicist}
= G. Weinreich
{c}
{synonym}
An experimental <optical physicist> who coauthored the observation of optical <second-harmonic generation>. A strong ruby-laser pulse passing through <quartz> produced light at twice the incident frequency. The experiment showed that a material's nonlinear polarization could mix an optical field with itself, turning a nonlinear response into a new observable color.<Generation of Optical Harmonics by Peter Alden Franken and others>[1961 report: ruby laser, quartz and doubled optical frequency]{ref}
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