Joanna Maria Vandenberg
Dutch solid state chemist and crystallographer
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Joanna (Joka) Maria Vandenberg (born 1938) is a Dutch solid state chemist and crystallographer who immigrated to the United States in 1968. At Bell Telephone Laboratories, she made a major contribution to the success of the Internet. She invented, developed, and applied the X-ray scanning tool for quality control essential to manufacturing indium gallium arsenide phosphide-based multi-quantum well lasers. These are the lasers that amplify and modulate light that travels through optical fibers that are at the heart of today's Internet.
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