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 8 of 12 Close-up of the Model 52 A close-up of the Model 52. The laser tube in this one was refurbished in the 1980s. Topic: Hardware Kick off your day with ZDNet's daily email newsletter. It's the freshest tech news and opinion, served hot. Get it.