Photos: Forty years of lasers at Coherent Summary: John Ambroseo, CEO of the self-proclaimed worldwide leader in photonics, gives CNET News.com a behind-the-scenes look at lasers. By Bill Detwiler | July 19, 2006 -- 11:34 GMT (04:34 PDT) Follow @billdetwiler Previous | Next Image 6 of 12 Overhead view of a Ring Dye laser An overhead view of the Ring Dye laser. Topic: Hardware Kick off your day with ZDNet's daily email newsletter. It's the freshest tech news and opinion, served hot. Get it.