Lightmatter, a startup valued at $4.4 billion, on Monday released two pieces of technology aimed at speeding up the connections between artificial intelligence chips. Instead of moving information between computer chips as electrical signals, Lightmatter’s technology uses optical connections and what are known as silicon photonics to move the information using light. Mountain View, California-based Lightmatter has raised $850 million in venture funding to date as such optical technologies have kicked off a wave of investments in Silicon Valley amid a search for better ways to string together chips to power chatbots, image generators and other AI applications.