Narinder Singh Kapany was a physicist, entrepreneur, and pioneer of fiber optics whose research helped create the foundations of modern telecommunications. After demonstrating the transmission of light through glass fibers, he brought the technology from the laboratory to the marketplace, founding companies in Silicon Valley and helping establish fiber optics as a commercial industry. He authored the first book on the subject and held more than 100 patents. Often called the “Father of Fiber Optics,” Kapany’s work laid the groundwork for the high-speed communications networks that power the modern internet age.